Examining the Speed-Flow-Delay Paradox in the Washington, DC Region: Potential Impacts of Reduced Traffic on Congestion Delay and Potential for Reductions in Discretionary Travel during Peak Periods: Final Report

December 2008

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Contact Information: Patrick DeCorla-Souza, FHWA Office of Innovative Program Delivery, Patrick.DeCorla-Souza@dot.gov

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Table of Contents

Acknowledgements

Foreword

Notice

Technical Report Documentation Page

SI (Modern Metric) Conversion Factors

Executive Summary

1. Introduction: Work Order Objectives

2. Traffic Delay Comparisons

I-95 Northbound for PM Peak Period
I-270 Corridor
I-495 Corridor
AM Peak Volume Analysis
What Does This All Mean?
Summary Traffic Analysis
I-95 Section Delay Analysis – I-95 Northbound from Brooklyn Bridge Road to Montgomery Road
I-270 Delay Analysis: I-270 Northbound – Section from I-370 to MD 109

3. Washington, DC Household Survey Key Findings

Methodology Used to "Mine" the MWCOG 1994 Survey
MWCOG Survey Findings
Morning and Afternoon Peak Longer Discretionary Trips
What Does This All Mean?

4. Effectiveness of Congestion Pricing Strategies: Literature Review Key Findings

What Does This All Mean?

Appendix A: Detailed Traffic Analysis for I-270 Corridor

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