VMT research

From SSTI, Summer 2020

Major roads undercut safety benefits of highly accessible places

Posted on June 15th, 2020 in AccessibilityNewsOutcomesTDMTags: accessibilityland usesafetyVMT

By Chris McCahill In working with transportation agencies across the U.S., our team often faces questions about the role of safety in accessibility analysis. While we know the safety and comfort of streets clearly impacts access for people on foot or bicycle, the effects of accessibility on

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

Posted on June 1st, 2020 in NewsTDMTags: parkingTDMtransitVMT

By Eric Sundquist 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 (VMT), however, in part because we don’t know whether

Researchers look at the transportation future as the country reopens

Posted on May 18th, 2020 in MultimodalNewsTDMTags: COVID-19road designTDMtransitVMT

By Robbie Webber As the economy recovers from COVID-19, how can we emerge with a better, stronger, and more resilient transportation system? Three recent reports analyzing the impact of the pandemic on transportation and personal attitudes toward transportation may offer some clues. Vanderbilt

Teleworking’s hidden environmental costs

Posted on May 18th, 2020 in NewsOutcomesTDMTags: TDMVMT

By Eric Sunquist 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

Comparing the car travel of Millennials and Generation X

Posted on May 18th, 2020 in NewsOutcomesTags: millennialsVMT

By Michael Brenneis According to data retrieved from the FHWA’s National Household Travel Surveys, in 2017 Millennials drove less than their Gen X counterparts did in 2001. A new study in the Journal of Planning Education and Research compares the 2017 VMT patterns of Millennials (birth year

California highway projects face review for induced travel

Posted on April 20th, 2020 in AccessibilityDOTsNewsOutcomesTDMTags: CAlegislationprojectionsVMT

By Eric Sundquist The implications of California’s SB 743 (2013), which is widely if somewhat imprecisely known as the “move away from level-of-service to vehicle-miles-traveled bill,” became clearer last week, as Caltrans issued guidance on which transportation projects will require

Planning for an uncertain future

Posted on April 20th, 2020 in DOTsNewsOutcomesTags: emissionsmobilitymodelingVMT

By Chris McCahill Traffic forecasts and other projections are often presented as a single line on a graph or number in a chart. But we know—now more than ever—that these predictions are full of uncertainties. The Sacramento Council of Governments (SACOG), for a new study in JAPA, puts hard

VMT ticks up again in 2019

Posted on March 23rd, 2020 in NewsOutcomesTags: trendsVMT

By Eric Sundquist Driving mileage in the United States climbed by just under 0.9 percent in 2019. On a per capita basis, the increase was just under 0.6 percent. The VMT figures come from FHWA’s latest Travel Volume Trends release. The per capita figure is 2 percent below the peak historic

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

Posted on March 9th, 2020 in NewsOutcomesTDMTags: e-commerceGHGVMT

By Saumya Jain With the constant increase in retail sales from e-commerce, there have been a number of studies studying the relationship between in-store and online shopping behavior and its impact on retail-related travel. Though few studies suggest that the relationship might be complementary,

The incompatibility of Vision Zero and VMT growth

Posted on February 24th, 2020 in MultimodalNewsOutcomesTags: crash risksafetyVision ZeroVMT

By Eric Sundquist The U.S. transportation field has tried many things to reduce traffic crashes, fatalities, and injuries: drunk-driving and seatbelt laws; in-vehicle safety improvements; wide, straight roads with crash zones; graduated licensing; and more. Yet traffic crashes still kill