Outcomes

Cleveland MPO worries about costs of continued freeway expansion

By Chris McCahill The greater Cleveland area is coming to terms with the sometimes-messy impacts of repeated highway expansions. For decades, highway-capacity investments have caused the area’s dwindling population to simply move around and spread out, and now eight new major interchange

NACTO releases safe speed limit guidance

By Eric Sundquist As the transportation field gradually moves away from its singular focus on high motor vehicle speeds and its reliance on motorist behavior to set speed limits, NACTO has just released comprehensive guidance on speed limits on surface streets in metro areas. “City Limits:

Conventional practice fails to account for induced traffic, even when the public demands it

By Eric Sundquist The problem of induced traffic, aka induced demand, is well-documented in the literature. Yet it is too rarely accounted for in practice. A new paper by Jamey M.B. Volker (University of California-Davis) and co-authors examines the environmental documents from five major highway

All-way stop signs reduce crashes by one-third

By Chris McCahill From 2009 to 2016, the District Department of Transportation (DDOT) in Washington, DC, converted 60 intersections from two-way stops (allowing free flow on the major route) to all-way stop control. A new study in the Transportation Research Record looks at 53 of those

Major roads undercut safety benefits of highly accessible places

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

“Dear diary, I took the bus today!” – Cost-efficient travel behavior influencers

By Saumya Jain “Soft” transportation policy measures can influence a significant reduction in personal car use, according to a new research published in Transportation Research Part D. The Behavioral Toolkit identifies six psychological variables that can affect travel behavior: attitudes;

Teleworking’s hidden environmental costs

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

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

With traffic down, Oregon DOT can move more vehicles at twice the speed

By Chris McCahill With overall traffic down due to the COVID-19 pandemic, one highway in Oregon is now moving higher traffic volumes at twice the typical speed, according to an analysis by Joe Cortright at City Observatory. This might seem counterintuitive, but it perfectly illustrates the

Oregon moves toward a safer speed-limit approach

By Eric Sundquist The Oregon Transportation Commission last month approved a revised speed-limit guidance that abandons the long-standing-but-arbitrary 85th percentile rule in many cases. Instead of relying on drivers to set speeds by their behavior, the new guidance provides context-based safe