NCHRP Research Report 1149: Estimating Benefits of Closing Gaps in Active Transportation Networks: A Guide

Cite as: National Academies of Sciences, Engineering, and Medicine. (2026). Estimating benefits of closing gaps in active transportation networks: A guide (NCHRP Research Report 1149). The National Academies Press. https://doi.org/10.17226/29333

Download at: NCHRP

Description

An active transportation network includes trails, sidewalks, bike lanes, and roads designed for walking, bicycling, or rolling. They are not only important for recreation, but for short trips as well. In many U.S. communities, these networks are fragmented or have gaps, making active travel less appealing or safe. TRB’s National Cooperative Highway Research Program (NCHRP) initiated a study to gain an understanding of the existing methods of quantifying active transportation gap closure benefits and develop a typology of gaps. David was the Primary Research Advisor for this guide and developed the methodologies for behavior change, network analysis, and advised on benefit calculations recommended throughout the guide.