The Road Less Traveled: Does Rail Transit Matter?

Document Type

Journal Article

Publication Date

2024

Subject Area

mode - rail, mode - tram/light rail, mode - car, place - north america, place - urban, planning - methods, planning - travel demand management, planning - service improvement, operations - performance, ridership - mode choice, land use - impacts

Keywords

quasi-experiment, light rail transit, AADT, auto use, induced demand

Abstract

Quantifying the effect of rail transit on vehicular traffic helps policy makers understand its transportation benefits. Previous studies seldom consider the effect over time and the influence of confounding factors. We apply a quasi-experiment research design to explore the evolving impact of the Green Line light rail transit on vehicular traffic in the Twin Cities, controlling for road classification, land use, and transit supply. The results show that rail transit is a substitute for automobile traffic, but induced and diverted trips gradually reduce the substitution effect. The reduced effect suggests that rail transit improves transportation system performance.

Rights

Permission to publish the abstract has been given by SAGE, copyright remains with them.

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