“Spillover” effects reinforce VMT effects from transit and parking subsidies

We know that employer-provided free parking tends to increase auto-commute trips and that employer-provided transit passes tend to reduce auto-commute trips. Research is less clear about the effect on vehicle-miles traveled, however, in part because we don’t know whether or how such employment practices might affect non-work travel. A new paper using travel survey data from the Seattle area, sheds new light on the VMT question.

Teleworking’s hidden environmental costs

Because of the COVID-19 pandemic and subsequent shelter-in-place orders, more Americans are teleworking. This has drastically reduced VMT and air emissions. Policymakers may be tempted to try to encourage teleworking post-COVID-19 in order to keep the traffic down and the air clean. But as we’ve reported before, telework is probably not a great strategy for emissions reduction, due to several rebound effects. Teleworkers tend to live farther from job centers, in lower-density environments, leading to longer, more auto-dependent commutes when they do go into the office, as well as higher levels of non-work VMT.

Sweden and Virginia: Messaging and variable tolls can influence mode choice

Two recent studies demonstrate two approaches to reducing driving. A Swedish study looked at what types of messages influence the choice to drive, while a report from Virginia shows that tolls on the I-66 corridor outside Washington have made a difference in both mode choice and when drivers travel.

Does Uber impact bike-share usage? Evidence from a natural experiment in Budapest

Significant research has gone into understanding the relationships between different urban transportation options and whether they support or compete with each other. It seems reasonable to think ride-hailing services like Uber might compete with bike sharing in urban areas, but findings from a recent study in Budapest suggest the opposite.

Impact of “new age” shopping behavior on VMT and the environment

There have been a number of studies studying the relationship between in-store and online shopping behavior and its impact on retail-related travel. A broadly accepted idea is that online shopping, in more ways than one, is substituting for in-store shopping and can thereby reduce shopping related travel. However, major demographic and economic factors affect shopping behavior, and expedited delivery options may reduce the potential of e-commerce to reduce VMT and greenhouse gas emissions.