Chatterjee, Arun, Thomas F. Wholley, Jr., Randall Guensler, David T. Hartgen, Richard A. Margiotta, Terry L. Miller, John W. Philpot, and Peter R. Stopher; Improving Transportation Data for Mobile Source Emissions Estimates; National Cooperative Highway Research Program, NCHRP Project 25-7; Washington, DC; 1996.

• Table of Contents
• Overview
• Chapter 1 - Requirements of Federal Law
• Chapter 2 - Key Transportation Variables for AQ Modeling
• Chapter 3 - Current Practice
• Chapter 4 - Sensitivity Analysis
• Chapter 5 - Error Analysis for Speed and VMT Mix
• Chapter 6 - Average Speed Uncertainty in Emission Rates
• Chapter 7 - Aggregation Analysis
• Chapter 8 - Improved Methodologies for Selected Parameters
• Chapter 9 - Conclusions and Recommendations