induced travel

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 calculator looks at how the addition of high-occupancy vehicle lane (HOV) miles contributes to the addition of vehicle miles traveled (VMT).

Associated publication in Transportation Research Record: Journal of the Transportation Research Board utilizing the Induced Travel Calculator to estimate the induced vehicle travel impacts of roadway capacity expansion projects in California.

This report uses the state-of-the-practice transportation demand model, the Sacramento Council of Governments SACSIM19 model, to examine (1) the model's representation of induced travel, (2) the influence of variation in key inputs on vehicle travel and roadway congestions, and (3) the effect of changes in induced travel-related input variables on the comparisons of scenarios with and without highway expansions.

The purpose of this literature review is to assess what is currently known about the ability of travel demand forecasting models (TDMs) to provide accurate forecasts for different types of transportation plans and projects with respect to different outcome measures of interest.

With Calculator use increasing, the Institute of Transportation Studies at University of California, Davis (ITS-Davis) initiated a project to update the National Center for Sustainable Transportation’s Induced Travel Calculator and improve its functionality based on recent data and empirical research.