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Table of Contents

Acknowledgements
Summary
What is the Mobility Monitoring Program?
What performance measures are used?
What data are used?
Introduction
Objectives of the Mobility Monitoring Program
Report Overview
New Report Elements
Additional Information and City Reports
Background
National Performance Monitoring Programs
Examples of State and Local Programs
Data, Analysis Methods, and Performance Measures
Participating Cities and Their Archived Data
Overview of Data Processing
Data Quality Checking
Congestion and Reliability Measure Calculations
Congestion Measures
Reliability Measures
Other Considerations for Performance Measure Calculations
Major Findings and Conclusions
Are traffic congestion and/or travel reliability getting worse?
How does reliability relate to average congestion levels?
How are the performance measures different, and what does each tell me?
Recommendations
Promote Local Use of Archived Operations Data and Performance Measures
Presentation and Use of Performance Measures in Decision-Making
Improve Traffic Detector Data Quality at Its Source
Integrate Event Data at the Local Archive Level
List of Figures
Figure 1. Preferred Archived Data Formats for Mobility Monitoring Program
Figure 2. Overview of Data Processing within Mobility Monitoring Program
Figure 3. Estimating Directional Route Travel Times and VMT from Spot Speeds and Volumes
Figure 4. Illustration of Misleading Trends When Measurement Coverage Increases
Figure 5. Exploring the Relationship between Congestion Level and Travel Reliability
List of Tables
Table 1. Key Features of National Performance Monitoring Programs
Table 2. Participating Cities and Agencies for 2003 Archived Data
Table 3. Summary of Data Collection Technologies and Level of Detail in 2003
Table 4. Summary of 2003 Freeway Archived Data Coverage
Table 5. 2003 Data Validity Checks in the Mobility Monitoring Program
Table 6. Summary of 2003 Freeway Archived Data Validity
Table 7. Summary of 2003 Freeway Archived Data Completeness
Table 8. National Congestion and Reliability Trends
Table 9. Trends (2001-2003) in Congestion and Reliability at the Freeway Section Level
Table 10. Traffic Congestion, Delay, and Reliability Statistics from Mobility Monitoring Program: 2000 through 2003
Table 11. Different Performance Measures May Reveal Changes in Different Elements of Performance

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