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Computer-Aided Dispatch - Traffic Management Center Field Operational Test Final Detailed Test Plan: WSDOT Deployment

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Contract #: DTFH61-02-C-00061
ITS Program Assessment Support Contract
Task SA61004

Submitted to:

United States Department of Transportation
Mr. David Helman
Dr. Joseph Peters

Submitted by:

Science Applications International Corporation
8031 Greensboro Drive
M/S E-7-6
McLean, VA 22102

October 2003

QUALITY ASSURANCE STATEMENT

The Federal Highway Administration provides high-quality information. To serve Government, industry, and the public in a manner that promotes public understanding. Standards and policies are used to ensure and maximize the quality, objectivity, utility, and integrity of its information. FHWA periodically reviews quality issues and adjusts its programs and processes to ensure continuous quality improvement.

NOTICE This report is in draft format. Comments on this
report should be provided to SAIC via email, fax, or mail, addressed to:

Nicholas D. Owens
Science Applications International Corporation
1710 SAIC Drive
McLean, VA 22102
Phone: 703-676-2408
Fax: 703-676-2432
owensni@saic.com

LIST OF CONTENTS

1.0       INTRODUCTION
2.0       EXPERIMENTAL DESIGN
2.1       Introduction
2.2       Experimental Design
2.2.1       Describing the FOT Environment
2.2.2       Identifying Key Performance Measures
2.2.3       Experimental Design
3.0      Data Collection Plan
4.0       Detailed Test Plans
4.1       System Performance
4.1.1      Integration of Secondary Responders
Test Schedule and Activities
4.1.2      Standards Test Plan
4.1.3      GIS Standards Test Plan
4.2       System Impact
4.2.1       Test Objectives
4.2.2       511/Internet Interface Test
4.3       Institutional Challenges
4.4       Technical Challenges
4.5       Lessons Learned Summary
4.6       Benefits Summary
5.0       Estimated Resource Requirements and Test Management
6.0       Schedule

LIST OF FIGURES

Figure 4-1. Key Data Points in Critical Incident Management Data Fields with Respect to the Time Period Immediately Before to Complete Recovery

LIST OF TABLES

Table 2-1. System Performance Experimental Design

Table 2-2. System Impact Experimental Design for Productivity

Table 2-3. System Impact Experimental Design for Mobility

Table 2-4. System Impact Experimental Design for Safety

Table 2-5. System Impact Experimental Design for Capacity/Throughput

Table 5-1. Test Component and Responsible Team Member Assignment

Table 5-2. Estimated Resource Requirements

Table 6-1. Evaluation Activities, Schedule, and Status

1.0     INTRODUCTION

The Statement of Work developed for IPAS Task 61004: Computer-Aided Dispatch (CAD) –Traffic Management Center (TMC) Field Operational Test (FOT) requires that Detailed Test Plans be developed to provide specific scopes of work for each part of the evaluation. This Detailed Test Plan document is submitted in response to this requirement.

Science Applications International Corporation (SAIC) was selected as the Independent Evaluator for this effort. This Detailed Test Plan document contains more detailed information than is presented in the Evaluation Plan document concerning the specific technical and data collection approaches being implemented for this evaluation. The Evaluation Plan document contains significant project background and system description information, as well as a discussion of the management approaches being utilized by SAIC in this effort, and should be reviewed alongside this Test Plans document.

An overview of the operational test and a review of the technical approach for this evaluation can be reviewed in the following reference:

Computer-Aided Dispatch - Traffic Management Center Field Operational Test Final Evaluation Plan: Washington State Department of Transportation Deployment, published September 22, 2003 for the Federal Highway Administration (FHWA) by SAIC in association with PB Farradyne and TranSystems.

The purpose of this document is to expand upon the evaluation components presented in the Final Evaluation Plan. This document defines the objective, approach, and work steps for each evaluation component, and describes the planned schedule for the completion of the evaluation. These evaluation components include:

The succeeding portions of this document are organized as follows:

2.0    EXPERIMENTAL DESIGN

2.1     Introduction

The Federal Highway Administration has established the following high-level objectives for the CAD-TMC Integration FOT:

The Evaluation Plan and the Detailed Test Plans developed by the Evaluation Team are designed to conduct the assessment and define how the FOT met these stated objectives. This section of the Detailed Test Plan document presents the experimental design developed by the Evaluation Team to facilitate this assessment.

This evaluation is being structured around a concept that involves documenting a baseline process and providing follow-up documentation of the improvements over time. Baseline data will be taken at a point in time close to “system turn-on”. Information and data gathered at this point will serve as the basis for comparison with multiple future measurement points taken at key opportunities following technology insertion or incident management team training.

Ideally, the Evaluation Team, with the stakeholders, will identify these key opportunities and monitor emergent adjustments in operational concepts as shown in Figure 2-1. The adjusted operational concepts will indicate opportunities for conducting follow-up interviews. These follow-up interviews will be used to revise the qualitative aspects of the baseline and produce a milestone-based documentation regarding the impact on process and procedures. The impact elements may then produce new efficiencies in communications, response, and overall incident management.

To capture the quantitatively measured aspects of the learning curve, the Evaluation Team will establish a data collection concept and make periodic data pulls fixed around known technology insertions and stakeholder-identified changes in concepts of operation. This effort will capitalize on the improvements in automatic reporting that are anticipated as part of the integration effort. Data collection to support evaluation will take into account the need to identify “burn-in” times associated with new technologies and operational concepts.

2.2    Experimental Design

The following activities will provide the basis of the experimental design for this evaluation:

2.2.1     Describing the FOT Environment

The first step in examining system component performance is defining the system. The Evaluation Team will maintain a description of the WSDOT CAD-TMC Integration FOT, and update this document whenever significant changes occur in the plans for the FOT or during the deployed FOT. The only data requirements are to document information about changes to the FOT deployment and deployment plans. Most changes to the FOT deployment will be noted during other evaluation activities and relayed to the Evaluation Team member responsible for maintaining the FOT description. In addition, the Evaluation Team will periodically review deployment activities with the FOT Deployment Team in order to identify changes that might not have been noted.

The following activities will occur throughout the evaluation period to ensure and maintain the accuracy of the system description. When a change to the FOT is noted, the FOT description will be updated, and the impact of the change on the evaluation will be identified. If any impacts are likely, the following steps will be taken:

Each change will also be reviewed to determine if the knowledge of or reason for the change might benefit other states interested in similar systems. If so, the Evaluation Team will gather additional information about the change and document that information as a “lesson learned”.

2.2.2    Identifying Key Performance Measures

Identifying key system performance measures is important for two reasons:

Three types of data are required for this part of the evaluation: the key system performance measures; the design basis for those measures and their computation;, and the observed values of those measures for the deployment. The Evaluation Team, in working with FHWA and the State of Washington, has identified a number of key performance measures, as presented in the Evaluation Plan. The Evaluation Team selected those performance measures for which there is a high degree of certainty that qualitative and quantitative data are available to measure the before and after system performance.

The following process was used to identify key performance measures:

2.2.3    Experimental Design

Using the process described in the preceding Sections 2.2.1 and 2.2.2, the Evaluation Team developed an experimental design for the evaluation, as summarized in Tables 2-1 through 2-5. For each table, the evaluation objective, hypothesis, measures of effectiveness (MOE), data source, and analysis will be described. The experimental design is developed to focus on the following areas:

Table 2-1. System Performance Experimental Design

Objective

Hypothesis

MOE

Data Source

Analysis

Document the system component performance.

The system meets functional specifications.

Types of incidents broadcast and data available for those incidents.

Interviews with deployment staff.

Review and description of interview results.

Design documents.

Review and description of these documents.

CAD message logs.

Sampling and summarization of messages broadcast.

CARS message logs

The lag time between incident verification by WSDOT/Washington State Police (WSP) and information availability to the general public and partner agencies.

CAD message logs.

Analysis of message log
time stamps.

CARS message logs

Operator interviews.

Review and description of interview results.

The quality and accuracy of information exchanged.

Operator interviews.

Review and description of interview results.

The type of TMC information available.

Interviews with deployment staff.

Review and description of interview results.

Design documents.

Review and description of these documents.

CAD message logs.

Sampling and summarization
of messages broadcast.

CARS message logs

Ease of access to CAD and TMC information.

Interviews with CAD and TOC operators.

Interview results.

The CAD and TMC systems will be able to link data on an incident

Use of common standards enabling the linking of information between the different systems.

Interviews with deployment staff.

Review and description of interview results.

Design documents.

Review and description of these documents.

CAD message logs.

Sampling and summarization
of messages broadcast.

Ability to obtain the same data on an incident from each system.

CARS message logs

Using the system-improved incident response procedures.

Percentage of events where information is shared between agencies.

Interviews with CAD and TOC operators.

Interview results.

CAD message logs.

Degree of interoperability achieved.

CARS message logs.

Review and description of interview results.

The extent to which the system was used.

Interviews with CAD and TOC operators.

Interview results.

Software and Website usage statistics.

Analysis of usage statistics.

Automate the seamless transfer of information between traffic management workstations
and police, fire, and EMS CAD systems from different vendors.

The FOTs will decrease the reliance on manual methods for exchanging information.

Percentage of
time that initial exchange of information is generated automatically.

Interviews with CAD and TOC operators and secondary responders.

Review and description of interview results.

Observations of CAD and TOC operator activities.

Review and description of observation results.

The FOTs will increase the extent and reliability of information exchanges.

Information will be used to improve responses.

Case analyses of events.

Review and summarization
of events.

Interviews with operators/facility managers.

Review and description of interview results.

Extend the level
of integration to include secondary responders such as utilities, towing and recovery, public works, and highway maintenance personnel.

Improved integration
of secondary responders will reduce incident recovery time by getting required recovery personnel to the incident site as quickly as possible to
begin recovery operations.

Identify secondary responders who are utilizing the system.

Document information
made available to responders and the extent to which it
is used.

Interviews with deployment staff.

Interviews with secondary responders.

Review and description of interview results.


Table 2-2. System Impact Experimental Design for Productivity

Objective

Hypothesis

Measure

Data Sources

Analysis Method

Improve the efficiency and productivity of incident response.

CAD-TMC integration enhances communications among responders.

Develop a process flow map of communications network used for specific incident classifications identifying all modes/all communications by type (voice or data and mode [wire or wireless]).

Communication logs and a survey.

Quantitative/ qualitative survey analysis.

Qualitative before/after comparison of communications systems.

CAD-TMC integration reduces incident clearance times.

Determine total time from incident detection until incident clearance for each incident classification. Compare baseline data with after data.

Incident management logs, radio and communication logs.

Descriptive statistical analysis and conduct tests for statistical significance of differences between before and after data.

CAD-TMC integration improves efficiency of
on-scene operations.

Determine total on-scene time required by incident classification from first arrival to last departure. Assess impact of CAD-TMC on non-value-added on-scene time for the various responding agencies. Compare baseline and after data.

Incident management logs to determine the on-scene time for each incident classification.

Descriptive statistical analysis and conduct tests for statistical significance of differences between before and after data.

CAD-TMC integration enhances efficiency in documenting incident management.

Determine ability of information management system to correctly archive incident management data in relational databases to support incident debriefs, statistical process control methods, and management level review.

Incident management records and surveys (designed to provide qualitative and quantitative data) of incident management personnel from on-scene personnel to senior management within the major stakeholder groups.

Quantitative/ qualitative survey analysis.

Before/after comparison of incident management logs.

Table 2-3. System Impact Experimental Design for Mobility

Objective

Hypothesis

Measure

Data Sources

Analysis Method

Improve mobility
and reduce incident-caused delays.

CAD-TMC integration improves mobility during incident management activities.

Determine speed and/or lane occupancy profiles to determine duration/length
of traffic characteristics (i.e., congestion and speed) in response to various incident classifications. Compare baseline and after data.

For high crash frequency freeway sections: hourly volumes for the identified locations during incident and non-incident periods.

Descriptive statistical analysis and conduct tests
for statistical significance of differences between incident and non-incident data.

Table 2-4. System Impact Experimental Design for Safety

Objective

Hypothesis

Measure

Data Sources

Analysis Method

Reduce exposure time of response personnel.

CAD-TMC increases safety for response personnel.

Determine the reduction in exposure (time on-scene) for personnel from each responding agency.

Incident management activity record analysis for on-scene time by agency.

Descriptive statistical analysis of key measures and conduct tests for statistical significance of differences between before and after data

Reduce secondary crashes related to incidents.

CAD-TMC increases safety the traveling public.

Determine incidence rate of secondary crashes and the local incident duration (mean and std dev) for specific incident classes for both the before and after cases.

Identified high crash frequency freeway segments through evaluation of records for all crashes (same and opposite direction within 2 miles and 2 hours) to identify secondary
crash patterns.

Descriptive statistical analysis of key measures and conduct tests for statistical significance of differences between before and after data.

Identify and document confounding factors.


Table 2-5. System Impact Experimental Design for Capacity/Throughput

Objective

Hypothesis

Measure

Data Sources

Analysis Method

To determine if CAD-TMC integration enhances incident-specific traffic management plans.

CAD-TMC integration enhances incident-specific traffic manage-ment plans.

Determine the diversion effect on traffic volumes over the affected link for specific incident classification. Compare baseline and after data.

For high crash frequency freeway sections: measure volume during incidents of each particular classification to approximate the level of traffic diversion.

Descriptive statistical analysis of key measures and comparison of baseline and after cases.

3.0     Data Collection Plan

The Data Collection Plan provides the process by which the Evaluation Team will collect and store data over the course of the CAD-TMC FOT evaluation. The purpose of the Data Collection Plan is to ensure that data are collected in an efficient, systematic, cost-effective manner, and that the integrity of collected data are upheld. These efforts will help ensure that the CAD-TMC FOT evaluation can be completed with as little time and effort as feasibly possible.

Data collection will occur before (baseline) and after the FOT deployment. Collection of before data will focus on establishing a baseline that will be used to measure the impact of the FOT deployment. Collection of after data will provide the data that will be compared to the baseline data to determine the impact of the FOT deployment. Collection of before and after data will occur via any of following identified methods:

The Evaluation Team identified the following data requirements for the CAD-TMC FOT evaluation:

Once data is collected it will reside in a single, centralized database over the life of the evaluation study. Data will be routinely downloaded from the FOT sites to the centralized platform, processed, and analyzed. Individual databases – or database subsets – will be copied to the evaluators’ local computers, as appropriate, in support of more sophisticated analyses, special studies, etc. Updates to the databases will always be made on the central platform and then copied, as needed, to the local platform.

Naming convention safeguards and control procedures will be implemented to ensure that individual “snapshots” of the raw data, as downloaded from the FOT sites, are maintained and not overwritten by subsequent updates to the database. As new tools and queries are defined, they will be added to the archive. Access to the central platform will be carefully limited and controlled.

Quantitative data will generally be stored as files using Microsoft® Access. Qualitative data will be stored as text files, typically in Microsoft® Word, and will be organized in directories and files by subject matter.

Access to the central platform will be password-protected so that only authorized members of the Evaluation Team can successfully log on to system. Even among Evaluation Team members, only those individuals who are designated as Database Administrators will have rights to update the original databases. Other users will be able to copy the databases only, customize them to address specialized needs, and generate and execute queries. Those users will not, however, be authorized to change or update the databases.

All data saved to the central platform will be simultaneously imaged to dual hard drives, to ensure ongoing data backup activities. As an additional precaution, the hard drives will be backed up daily, whenever there is activity on the platform.

The databases, analysis tools, and system outputs will all be archived with date-and-time stamps. At the conclusion of the study, the final databases and archived analysis tools will be delivered to FHWA.

4.0     Detailed Test Plans

This section provides the detailed test plans for the CAD-TMC evaluation. The remainder of this section is organized as follows:

4.1    System Performance

The System Component Performance Study will address two primary objectives of the CAD-TMC evaluation: (1) examine system component performance, and (2) discuss how well the project meets the FOT objectives.

In addition to examining the system component performance and determining how well the project meets the FOT objectives, these evaluation activities will also:

Data Requirements and Collection Methods

Three types of data are required for this part of the evaluation: the key system performance measures; the design basis for those measures and their computation; and the observed values of those measures for the deployment. The following list provides a starting point for data collection of key system performance measures as identified as part of the Evaluation Plan:

This list of performance measures will be refined and explored via email exchanges and discussions at meetings with the Deployment Team, as well as by reviewing acceptance criteria that are part of the system testing. Documenting the observed values of the key system performance measures will help determine whether the deployed system lives up to its design expectations.

Test Activities and Schedule

For the purpose of this evaluation, test activities are further defined as pre-test, test, and post-test to indicate pre-deployment, during deployment, and post-deployment evaluation activities.

Pre-Test Activities

The pre-test activities will focus on identifying the design values for the performance measures. These activities will include the following:

Test Activities

Post-test Activities

Post-test activities will consist primarily of conducting interviews with deployment staff and CAD, TMC, and secondary responder operators focused on how system usage and the system performance measures changed during the assessment period.

Data Analysis Report

The majority of the analysis will include a review of interview findings. Software and Website usage will be compared to the number of incidents that occurred to estimate the fraction of incidents for which the system was used. Trend analysis will also be used to examine changes in usage rates as users become more familiar with the system.

Format and Expected Contents

The report will document the observed performance measures and changes in those measures during the assessment period. The report will also summarize interview findings and provide a text description of the other factors affecting system performance.

4.1.1    Integration of Secondary Responders

The objective of the secondary responder assessment will be to document how:

A baseline Secondary response issues will be developed as a component of the overall “before” data collection. The evaluation team will then monitor how these challenges are addressed and resolved throughout the course of the FOT. The evaluation recognizes that this list of challenges will change during the course of the FOT as existing challenges are resolved and new challenges are identified through the course of the deployment. The “after” data collection will be used to obtain stakeholder assessments on how the FOT improved the process of notification and deployment of secondary responders including the impact on overall response and clearance times.

Data Requirements and Collection Methods

The data required to conduct this particular test will be qualitative in nature. Data will be collected through:

Test Schedule and Activities

The baseline stakeholder interviews will be conducted as part of the overall FOT “before” and “after” data collection activities. Review of documents and observations by the evaluation team will be done on an on-going basis throughout the FOT. Findings from the document review and evaluation team observations will be incorporated into the “before” and “after” stakeholder interviews.

Pre-test activities will focus on identifying and listing secondary responders, and how they are now notified and deployed. Reviewing the results of the evaluation kick-off meeting and strategy briefing will be used to identify issues from secondary responders.

In developing questions for the secondary responders, the evaluation team will review questions used for stakeholder interviews in deployment evaluations and select those that can be tailored to address the needs of the FOT. The evaluation team will also rely on the experience of individual team members in working with FOT agencies to develop additional questions and revise the format of questions as necessary.

The questions will be reviewed with the Project Manager to ensure that secondary responder issues are adequately addressed.

Test activities will include scheduling and conducting secondary responder interviews for the “before” and “after” phases of data collection.

Post-test activities will include the analysis of information obtained through secondary responder interviews and document review and the preparation of the final evaluation report and the final evaluation briefing.

Data Analysis

The analysis will focus on determining how secondary responders are requested, by whom, when they are notified, and how the CAD FOT impacts that process.

Report Format and Expected Contents

The secondary responder report will be incorporated into the overall final evaluation report and the final evaluation briefing as separate sections of each deliverable. The sections will be structured as follows:

Conclusions and recommendations derived from the results of this review will be incorporated into a stand-alone section in the final evaluation report and final evaluation briefing.

4.1.2    Standards Test Plan

The objective of the standards assessment will be to document the degree to which standards were incorporated into the FOT deployment. This includes determining the degree to which systems were integrated before and after FOT deployment. To achieve this objective the Evaluation team will perform the following steps:

Data Requirements and Collection Methods

The data required to conduct this particular test will be qualitative in nature. Data will be collected through:

Test Schedule and Activities

Pre-test Activities

Pre-test activities will focus on scanning the standards development arena to determine applicable standards that are ready or near-ready for deployments and identifying systems currently in place as a basis to determine the applicable standards associated with each system. This includes scheduling site visits with appropriate agencies that operate systems to determine the system types and system vendors.

Test Activities

Test activities will consist of scheduling and conducting stakeholder/vendor interviews for the “before” and “after” phases of data collection. The interviews will focus on the standards considered for use for the FOT and reasons for either using a selected standard or not using an applicable standard.

Post-test Activities

Post-test activities will include the analysis of information obtained through stakeholder/vendor interviews and systems identification and the preparation of the final evaluation report. The analysis will primarily be a comparison of standards used and those that could be applied to this type of effort and are ready for use.

Data Analysis

Qualitative data collected from site visits and interviews will be analyzed to determine the degree to which standards were incorporated into in the FOT deployment. This includes a comparison of standards in use before and after the deployment. The analysis will include why the data is applicable, and whether ready to deploy standards were used or were not used. For those used, the analysis will include a discussion of how easy it was to implement the standard and how well the standard matched the needs of the project.

Report Format and Expected Contents

The standards assessment report will be incorporated into the both overall final evaluation report and the final evaluation briefing as separate sections of each deliverable. The sections will be structured as follows:

Conclusions and recommendations derived from the results of the standards assessment will be incorporated into a stand-alone section in the final evaluation report and final evaluation briefing.

4.1.3     GIS Standards Test Plan

Test Objectives

One difficulty that is often encountered when sharing data betweeen road-based systems is that of overcoming the incompatibilities in the underlying map data in the systems. These incompatibilities can be simple to correct as different naming conventions for roads (e.g., “Rd” insteas of “Road”; “1st” instead of “First”); or can be as complex to correct as actual differences in the road topology (e.g., missing roads); differences in the road names; or differences in the road coordinates. Taken together, these incompatibilities can degrade the effective communication between systems.[2] Documenting how the WSDOT FOT overcame these difficulties – and the extent to which these difficulties impeded the effectiveness of the system – can help future sites that might employ similar techniques. The objective of these assessments will be to document how ITS standards and the sharing of map databases using GIS were successfully incorporated into the system.

Date Requirements and Collection Methods

The Evaluation Team will obtain qualitative assessments on how well ITS standards and the sharing of map databases using GIS through interviews with the Deployment Team, system operators, and end-users. These interviews will be conducted in conjunction with interviews conducted for other tests. The Evaluation Team will identify questions in support of this test that will be incorporated into an overall interview guide.

The Evaluation Team will also conduct performance tests on the effectiveness of the approaches used to share data by conducting round-trip exchanges of location information.

Test Schedule and Activities

Pre-Test Activities

Pre-test activities will focus on scanning the GIS systems used by different vendors to identify differences that need to be addressed to share information and identify the approaches to be used for sharing this information.

Test Activities

Test activities will consist of scheduling and conducting stakeholder/vendor interviews for the “before” and “after” phases of data collection. Test activities will also include the conduct of the performance tests.

Post-Test Activities

Post-test activities will include the analysis of information obtained through stakeholder/vendor interviews, and the performance tests and the preparation of the final evaluation report.

Data Analysis

The Evaluation Team will document the results of all interviews to document:

The Evaluation Team will analyze the results of the round-trip exchanges of location information by performing statistical tests on the differences introduced. The intent of these analyses will be to determine the accuracy of the information exchanged.

Report Format and Expected Contents

The GIS standards assessment report will be incorporated into both the overall final evaluation report and the final evaluation briefing as separate sections of each deliverable. The sections will be structured as follows:

Conclusions and recommendations derived from the results of the standards assessment will be incorporated into a stand-alone section in the final evaluation report and final evaluation briefing.

4.2     System Impact

4.2.1     Test Objectives

The system impact test will be conducted to quantify and document the impact of CAD-TMC Integration on Incident Management processes. Ultimately, the benefits of will be measured from the points of view of two different beneficiary groups: incident responders and travelers. The objectives of the System Impact Study will be to determine if the integration of CAD and TMC systems:

The evaluation premise for the incident response community is that integration yields the following benefits:

Within the response community, the stakeholders are defined as primary responders and follow-on responders:

The benefits of integrating the dispatch systems for these two communities are anticipated to be quicker response and a more accurate understanding of the incident management requirements for the specific incident in progress. This improved situation awareness is anticipated to lead to more efficient execution of the incident management activities.

The evaluation premise for the second beneficiary group, the travelers, is that improvements in incident management:

To support the tests required to prove or disprove the system impact hypotheses, the Evaluation Team developed an assessment framework that facilitates the measurements required to support experimental analysis. The method is an adaptation of standard process performance measurement tools used in project management.

The first step in developing the method is generation of an Incident Management Process description, which identifies the activities that take place within the process. Activities within the process will be defined as measurable tasks.

A measurable task is one for which the beginning and end times can be determined; the resource requirements of the task can be easily determined; and the prerequisites for task initiation can be identified.[3]

Individual measurable tasks that are related in purpose or sequence will be grouped into phases to provide visibility into the interactions between the activities within the phase and between activities in one phase with the activities of those in another phase. A conceptual illustration of the incident management process, illustrated in general phases, is shown in Figure 4-2[4]. This figure shows the functional areas of traffic incident management and how they are linked, beginning with: initial detection/verification; incident response; site management of the incident; and, clearance of the incident. These phases include response initiation, life-saving response, environment mitigation, restored roadway operations, and repair and recovery.

With the individual incident management activities defined, the complete inventory of tasks required to manage a particular incident (or class of incident) will be used to define the process in the form of an activity network diagram. The network diagram will represent the process as a system allowing quantitative assessment along key performance measures using Critical Path Methods[5].

Data Requirements and Collection Methods

The data and information required will be defined by answering the following questions:

  1. Type of incident
  2. Where was it?
  3. What time did it occur?
  4. When was it reported?
  5. When was response dispatched?
  6. When did they arrive?
  7. When were secondary responders requested?
  8. When did they arrive?
  9. How many lanes were blocked?
  10. When did each lane get cleared?
  11. What were the weather conditions?
  12. When was the TSMC advised?
  13. What actions were taken by the TSMC? (DMS messages, 511 information, etc.)
  14. When were the messages or motorist information updated?
  15. How did the highway section perform over the timeframe (including a period before and after)?
  16. Were there any secondary effects (i.e., crashes, severe impacts on diversion route flow, etc.)?

Figure 4-1 provides an example of the integrated picture, which can be developed if the methods used to answer these questions can be fully supplied with data. The Evaluation Team recognizes that full data availability across an entire region may be problematic, and, therefore, will work with DOT personnel to target corridors where there are significant incident histories and high levels of data available.

Figure 4-2 shows a graph that indicates the key data points in critical incident management data fields with respect to the time period immediately before complete recovery regarding the primary Incident History and the Secondary Incident History. The data fields comprise three columns and five rows. The data categories are listed as Incident History, VSL History, VMS History, Highway Performance, Highway Shockwave, Arterial Performance, and Secondary Incident History, and are displayed to the far right at the end of each row in a linear vertical fashion. The data field contents of the graph are displayed as follows for the Incident History that is recorded for an accident at Exit 171: row 1, the three data fields indicate "None" for VSL History. For row 2, VMS History, the three data fields contain "Blank", "Accident Exit 171 Left Lane Blocked", and Accident Exit 171 and Exit 173". For row 3, Highway Performance, the three data fields contain "4200 Vph", "2400 Vph", and "2400 Vph". For row 4, Highway Shockwave, the three data fields contain "0 Miles", "4 Miles", and "7 Miles". For row 5, Arterial Performance, the three data fields contain "1700 Vph", "2100 Vph", and "2100 Vph".

Figure 4-1. Key Data Points in Critical Incident Management Data Fields
with Respect to the Time Period Immediately Before to Complete Recovery

The methods used to gather this data and information will include the following elements: surveys; interviews; data queries of the incident management system; and data queries of important supplemental databases, including highway performance data and crash histories. Survey groups will include incident management personnel both before and after deployment. The surveys will be supplemented with interviews that will provide the Evaluation Team the important contextual information. Databases archived by the incident management system will be accessed using routine and/or special queries to support generation of the data records described in a subsequent section.

The data will be comprised of several databases that must be time-tagged to support future analysis queries. A key component of the data collection will be the development of a time synchronization method to allow relational analysis. Representative examples of key incident management data fields are illustrated and described in the following tabular field context. These tabular fields may be embellished as required to describe complex incidents. Where a single entry is shown for a responder category and multiple agencies are involved, the data fields will need to increase to capture the same level of detail for each responding agency and/or crew.

Incident Identification

Incident Location and Impact on Traffic Flow

Primary Response Information

Follow-on Response Information

Responder Departure, Lane Restoration History, and Incident Termination

The Evaluation Team realizes that the range and depth of data available at the beginning of the effort may be less than that available at the end of the effort. This enrichment of data availability, particularly in relational format, will be a key aspect of the evaluation leading to improved ability to monitor and measure the incident management system.

Supplemental data to relate the changes in incident management to the impacts on mobility and safety include:

Test Activities and Schedule

Pre-Test Activities

Pre-test activities will be directed towards achieving the following three objectives:

Test Activities

Test activities can be divided into two broad categories depending on the time frame of interest: documentation of the baseline system performance, and documentation of system performance over time. Activities within each are briefly described as follows.

An important first step evaluating the CAD-TMC integration is to document the baseline performance of the mature, high-performance incident management system currently in use. Capturing the system operational description and performance qualities in its current form will establish a benchmark performance level. This effort will include documenting the incident management system and evaluating the performance of each component along key measures of effectiveness.

Once the baseline process is documented, the next step is to conduct a series of measurements over time to document the “learning curve” associated with the CAD-TMC integration. The Evaluation Team will work closely with the stakeholders to identify the “milestone” events that will take place over the life of the deployment and evaluation.

Post-Test Activities

Post-test activities will include documenting the findings in the framework and format presented in a subsequent section of this DetaiCed Test Plan. Within the Post-Test Activities report, the technical content for the final report will be developed and archived.

Data Analysis

Data to support the CAD-TMC integration evaluation is expected to be collected in three forms: incident management personnel survey results; interview results; and quantitative data. The first step in the survey data analysis will be to develop the descriptive statistics for the responses to each type of question. Using this information, a before and after comparison will be made, and the statistical significance of the change will be computed. If required, due to the relatively small population in each personnel category, non-parametric methods will be used.

The primary purpose of the interviews is to generate descriptions of different aspects of the system’s operational concept and the resulting performance. In addition, the interviews will provide the opportunity to capture anecdotal benefit statements that may be paired with survey or data analysis.

The second purpose of the interviews is to capture some response quotes which will enhance the final report by relating issues, concerns, and breakthroughs to the target audience (public officials and system implementation personnel) in the terms used by their peers.

Quantitative data is being sought in several areas as highlighted in the Data Requirements section. The first objective in the quantitative analysis will be to determine the descriptive statistics and frequency distributions of the data sets in question. With this information, the analysis will progress to determine the statistical level of significance in response to the implementation the CAD-TMC integration system.

Both parametric and non-parametric methods will be used, if required. Methods will be selected based on analysis of the data. Candidate parametric methods include determination of the Statistical Power of the difference given a desired significance level and the T-Test or the F-Test to determine the existence of a difference between before and after data sets. Non-parametric methods include Chi-Squared and Kilmogorov-Smirnoff tests for difference in system performance due to the treatment in question.

4.2.2     511/Internet Interface Test

The objectives of the 511/Internet interface portion of the System Impact Study is to determine if integrating CAD and TMC systems result in the following:

The measures of effectiveness that the Evaluation Team will use to test the hypothesis are:

Data Requirements and Collection Methods

Data to test the hypotheses will be collected through:

Test Schedule and Activities

Pre-Test Activities

Pre-test activities will focus on scanning the data from the CAD system, CARS, and Website logs to become familiar with the data and how it is reported. Pre-test activities will also include designing the Web-based questionnaire.

Test Activities

Test activities will consist of collecting CAD, CARS, and Website log data, and fielding the Website questionnaire for the before and after phases of data collection.

Post-Test Activities

Post-test activities will include the analysis of information obtained through the data collection effort and the preparation of the final evaluation report. The analysis will include both quantitative comparisons of before and after data from the CAD logs, CARS database, Website logs, and numerical input on the questionnaire and a qualitative analysis of comments provided from the Website questionnaire.

Data Analysis

Quantitative comparisons of time to post information and percent of eligible incidents that are reported will be undertaken by the team. Likewise, a quantitative comparison will be made of the numerical input to the before and after questionnaires. Statistical analysis of the data will be undertaken to determine the significance of any before and after differences. In addition, comments submitted as part of the questionnaires will be reviewed to see if any conclusions can be drawn from that source of information.

Report Format and Expected Contents

The 511/Internet interface report will be incorporated into the system impact study portion of the final evaluation report and the final evaluation briefing. The 511/Internet interface section will be structured as follows:

Conclusions and recommendations derived from the results of the 511/Internet interface assessment will be incorporated into a stand-alone conclusions and recommendations section in the final evaluation report and final evaluation briefing.

4.3 Institutional Challenges

The objectives for the institutional challenges assessment will be to document how:

A baseline of institutional challenges will be developed as a component of the overall baseline (before) data collection. The Evaluation Team will then monitor how these challenges are addressed and resolved throughout the course of the FOT. The Evaluation Team recognizes that this list of challenges will change during the course of the FOT as existing challenges are resolved and new challenges are identified through the course of the deployment. The after data collection will be used to obtain stakeholder assessments on how institutional challenges were resolved.

Institutional challenges will be identified in three ways: interviews with FOT stakeholders (most important); review of FOT related documents; and observations by the Evaluation Team. The identification of challenges will include:

Data Requirements and Collection Methods

The data required to conduct this particular test will be qualitative in nature. Data will be collected through:

Test Schedule and Activities

The baseline stakeholder interviews will be conducted as part of the overall FOT baseline (before) and after data collection activities. Review of documents and observations by the Evaluation Team will be performed on an ongoing basis throughout the FOT. Findings from the document review and Evaluation Team observations will be incorporated into the before and after stakeholder interviews.

Pre-Test Activities

Pre-test activities will focus on identifying institutional challenges and developing questions that will be used for stakeholder interviews. Reviewing the results of the Evaluation Kick-off Meeting and strategy briefing will be used to identify institutional challenges. In addition, institutional challenges will be identified through the review of all FOT-related documents and initial conversations with the FOT Project Manager and key staff supporting the FOT.

Questions developed for interviews will be designed to:

In developing questions, the Evaluation Team will review questions used for stakeholder interviews in deployment evaluations and select those that can be tailored to address the needs of the FOT. The Evaluation Team will also rely on the experience of individual team members in working with FOT agencies to develop additional questions and revise the format of questions as necessary. The questions will be reviewed with the Project Manager to ensure that any institutional sensitivity is adequately addressed and that all challenges are identified and addressed by the questions.

Test Activities

Test activities will include scheduling and conducting stakeholder interviews for the before and after data collection phases.

Post-Test Activities

Post-test activities will include the analysis of information obtained through stakeholder interviews and document review and the preparation of the final evaluation report and the final evaluation briefing.

Data Analysis

The information obtained will be synthesized and categorized as necessary in terms of the particular challenges identified. The analysis will focus on determining how a particular challenge was resolved, if the stakeholders felt the resolution was appropriate, and what impact the particular challenge had on the FOT. The analysis will be qualitative in nature, and will focus on the following elements:

Report Format and Expected Contents

The institutional challenges report will be incorporated into the overall final evaluation report and the final evaluation briefing as separate sections of each deliverable. The sections will be structured as follows:

Conclusions and recommendations derived from the results of the institutional challenges review will be incorporated into a stand-alone section in the final evaluation report and final evaluation briefing.

4.4    Technical Challenges

The objectives of the Technical Challenges Assessment are to document the key technical challenges faced by the FOT team, how these challenges are addressed, and the final resolution of the challenges. This evaluation test plan describes the approach that will be used by the Evaluation Team to document this information. The Evaluation Team developed this plan on the premise that this particular test will be ongoing throughout the course of the evaluation.

Data Requirements and Collection Methods

There are two types of data required to assess technical challenges: identifying challenges that occur, and documenting how the FOT Deployment Team resolves those challenges.

The data required to conduct this particular test will be qualitative in nature. Data will be collected through:

Test Schedule and Activities

Pre-Test Activities

Pre-test activities will focus on identifying technical challenges and developing questions that will be used for stakeholder interviews. Reviewing the results of the Evaluation Kick-off Meeting and strategy briefing will be used to develop an initial list of challenges. In addition, technical challenges will be identified through the review of all FOT-related documents and initial conversations with the FOT Project Manager and key staff supporting the FOT.

Test Activities

Test activities will include the following elements:

Post-Test Activities

Post-test activities will include the analysis of information obtained through stakeholder interviews and document review, and the preparation of the final evaluation report and the final evaluation briefing.

Data Analysis

The information obtained will be synthesized and categorized as necessary in terms of the particular challenges identified. The analysis will focus on determining how a particular challenge was resolved, if the stakeholders felt the resolution was appropriate, and what impact the particular challenge had on the FOT. The analysis will be qualitative in nature, and will focus on:

Report Format and Expected Contents

The evaluation report will include a section for the Assessment of Technical Challenges. In this section, the Evaluation Team will document the following information about each technical challenge that was assessed during the evaluation:

The text will also highlight any lessons learned about deploying and operating a system such as the WSDOT CAD-TMC Integration FOT.

4.5    Lessons Learned Summary

Test Objective and Approach

The Lessons Learned Summary will document the lessons learned, insights ascertained, and any other identified element by the FOT Team during the process of integrating the CAD and TMC systems. These lessons will be identified and documented by the Evaluation Team using a two-fold approach:

17.  A content analysis, or scan, of existing CAD/TMC documentation and documentation resulting from the other test plan components. The documentation will be scanned to identify and extract “lessons” of interest to other states and regions potentially integrating CAD/TMC systems.

18.  Interviews with key members of the FOT Team and selected stakeholders to glean major insights and sensitivities into the process and issues. This assessment activity is qualitative in nature.

Data Requirements and Collection Methods

At the outset of this effort, an electronic matrix will be created and used for collecting and capturing the lessons learned data. The matrix will be organized by activity sequence, or step, in the CAD/TMC integration process, beginning with “cultivating stakeholder support in CAD/TMC integration”, and extending through “operation and maintenance of an integrated CAD/TMC system.” Major categories in the matrix will be subdivided into activities or function areas, as appropriate. Lesson learned data will be entered into the matrix as they are gathered.

Documentation reviewed by the Evaluation Team will include materials describing the existing WSP/WSDOT integration, how the integration was accomplished, and other factors. Document review will also include outputs of other test plan components, i.e., the system performance assessment, system impact study, institutional challenges assessment, and technical issues assessment. Information will be recorded within the matrix when these test findings identify or point to lessons learned.

Questions related to lessons learned will be part of the instrument guiding the general interviews with FOT Team members and other stakeholders. As previously noted, the focus will be on lessons and insights into sequential components of the CAD/TMC integration process. Individual stakeholders, of course, will only be queried about the parts of the process with which they are familiar.

Test Schedule and Activities

Pre-Test Activities

Pre-test activities will involve defining the categories or steps for which lessons learned data will be captured. Once these categories are defined, the electronic matrix will be created. The lessons learned queries to be covered during stakeholder interviews also will be identified during the pre-assessment period.

As an aid to FOT Team members and stakeholders participating in the interview process, a short 2- or 3-page Lessons Learned Guide will be prepared and distributed shortly before the interviews are conducted. The guide will encourage interviewees to think systematically and structurally about the process as they identify the most vital lessons to be imparted to other states and regions heading down the CAD/TMC integration path. The reason for distributing the guide before the interviews will be to give stakeholders an opportunity to ruminate on the issues.

Test Activities

Test activities conducted during the assessment period will include Evaluation Team scanning documentation for lessons learned and conducting stakeholder interviews. Lessons information will be entered into the electronic matrix as it is identified and collected.

The capturing of lessons learned will be an ongoing process. However, a part of the assessment effort will not be able to be conducted until late in the period. For instance, other test plan components cannot be reviewed for lessons learned until after the tests are completed and documented. Similarly, it will probably be preferable to interview stakeholders late in the period, after they have experienced most of the integration process.

Post-Test Activities

Post-test activities will consist of analyzing the information in the lessons learned matrix and documenting the results.

Data Analysis

The contents of the lessons learned matrix will be analyzed for completeness, comprehen-siveness, and consistency. Redundancies will be eliminated, as appropriate. Data will then be extracted from the matrix. Recurring and “big-picture” themes will be identified and highlighted, and materials will be readied for presentation in narrative and display formats.

Report Format and Expected Contents

A major section of the final evaluation report will be devoted to lessons learned. The section will be organized by activity sequence in the CAD/TMC integration process. Lessons will be presented using a series of matrices and accompanied by succinct narratives.

4.6     Benefits Summary

Test Objective and Approach

The Benefits Summary will document the primary benefits that accrued as a consequence of CAD/TMC integration during the FOT. It will identify which benefits expected by the state were actually realized, which hypotheses in the CAD/TMC FOT Test Evaluation Plan were borne out, and whether any unanticipated gains were observed. The Benefits Summary will be compiled, principally, through extraction, assessment, and analysis of findings from the Systems Impact Study.
Development of the Benefits Summary will follow this general approach:

Data Requirements and Collection Methods

Both quantitative and qualitative data, primarily from the Systems Impact Study, will be used to assess benefits. Most of the quantitative assessments will center on before and after data. In contrast, the bulk of the qualitative data will come from interviews with stakeholders.

Key data to be used in the assessment of findings will include:

Test Schedule and Activities

Pre-Test Activities

Pre-test activities will focus on understanding the expected benefits and compiling them in a table organized by user category, e.g., responder, system user, traveler, etc.

The identification of expected benefits will include a scan of existing CAD/TMC documentation and summarizing those benefits referenced in the draft test plan. The table will also capture how data from the Systems Impact Study are expected to support the benefit.

Test Activities

Test activities during the assessment period, the Systems Impact Study will be examined with regard to the beneficial impacts that resulted from integration. These impacts will be cross- tabulated against the table of expected benefits. A summary table, showing both benefits and the interrelationships between system impacts and measures of effectiveness, will also be generated. The most critical measures of effectiveness are expected to be incident response and clearance times, operator time per incident/activity, and FOT Team/stakeholder input.

Post-Test Activities

Post-test activities will consist of analyzing the information in the Benefits Summary Table and documenting the assessment findings.

Data Analysis

The Benefits Summary will assess both qualitative and quantitative data in order to determine the benefits of the integration and indicate the extent of benefits realized. It will center on expected benefits, including those articulated by FHWA, state stakeholders, key FOT Team members, and those identified in other recent sources.

Report Format and Expected Contents

The Benefits Summary will be a section of the final evaluation report. The summary will consist of a series of data tables accompanied by a succinct narrative. These materials will identify the benefits realized from CAD/TMC integration and describe how key benefits were achieved.

5.0     Estimated Resource Requirements and Test Management

This section of the Detailed Test Plans document presents the estimated resource requirements needed for completing the proposed tests. To ensure that the tests are conducted in a cost effective manner that uses available resources efficiently, the Evaluation Team will:

The Evaluation Team will also assign a member of the team to manage each test component, as shown in Table 5-1. These staff will be responsible for working with Mr. Jacobsen to ensure that all data elements are identified and incorporated into the data collection plan. These staff will also be responsible for identifying issues and developing questions that will be incorporated into stakeholder interviews and the collection of qualitative data.

Table 5-1. Test Component and Responsible Team Member Assignment

Test Component

Assigned To