induced travel | National Center for Sustainable Transportation

A New Web Tool to Calculate Induced Travel

Research Product Type

Presentation

A New Web Tool to Calculate Induced Travel Presentation

Research Product Type

Presentation

Caltrans Planning Horizons: Induced Vehicle Travel in the Environmental Review Process

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.

Environmental Reviews Fail to Accurately Analyze Induced Vehicle Travel from Highway Expansion Projects

Research Product Type

Policy Brief

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.

Increasing Highway Capacity Induces More Auto Travel

Research Product Type

Policy Brief

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.

Induced Travel Calculator

Research Product Type

Calculator

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

Induced Travel Calculator Improvements

Principal Investigator Jamey Volker, PhD
University of California, Davis

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.

Project Status

Complete

Induced Travel Calculator Project

Principal Investigator Susan Handy, Ph.D.
University of California, Davis

This project will develop a web-based tool for calculating the induced travel effects of highway expansion projects

Project Status

Complete

Induced Vehicle Travel in the Environmental Review Process

Research Product Type

Associated Publication

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.

Updating the Induced Travel Calculator

Research Product Type

Research Report

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.