Empirical research shows that expanded roadway capacity attracts more vehicles. However, environmental impact assesments of roadway expansion projects often ignore, underestimate, or mis-estimate this induced travel effect and overestimate potential congestion relief benefits.
This study examines the personal and trip characteristics associated with ridehailing users’ decisions to substitute other modes of travel or conduct new trips by ridehailing.
This policy brief summarizes findings from research that compared results from the NCST Induced Travel Calculator to the induced travel analysis completed for five highway expansion projects' actual environmental impact assessments.
This project will develop guidance for evaluating sociodemographic disparities from the impacts of State Highway System expansion projects and associated vehicle miles traveled (VMT) mitigation strategies.
The purpose of this project is to explore the induced travel effects of categories of roadway expansions not currently covered by the Induced Travel Calculator, including minor arterials, interchanges, on- and off-ramps, and non-general-purpose facilities.
Researchers at the University of California, Davis reviewed the empirical research on induced travel to understand the likely effects of adding roadway capacity in a variety of contexts.
This project will explore possible improvements to the UC Davis Induced Travel Calculator and develop recommendations for any further improvements that would require additional resources.
