research

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

Findings from Toronto: Sticks and carrots for TNCs

By Eric Sundquist We have a lot of evidence that venture capital-subsidized transportation network companies (TNC) are cannibalizing transit and driving up VMT. Now a new study of this phenomenon from the University of Toronto examines the patterns of TNC trip making and suggests a system of

Residential exposure to local traffic emissions associated with higher risk of stroke

By Yicong Yang A recent study finds that long-term residential exposure to locally emitted black carbon (BC)—primarily from traffic exhaust—is associated with higher stroke incidence. BC comprises a significant portion of particulate matter. Although BC is a known health hazard with health

Why are they Snapchatting while driving, and what will get them to stop?

By Robbie Webber A study from Australia gives some insights into use of social media while driving, looking not just at the incidence, but also what deters the behavior. But while the study began as a general look at use of all social media by young drivers, it ended up focused on the use of

A troubled marriage between safety research and practice

By Chris McCahill Road design often is not as science-based as we like to think, according to a new study in Accident Analysis & Prevention. Years of biased or misreported research findings inform many of the design practices that are common today. And while there is plenty to be learned from

A method for quantifying risks imposed on cyclists while sharing road with motor vehicles

By Saumya Jain Keeping vehicle occupants and pedestrians safe via engineering standards and street warrants is common practice around the world. But in spite of the growing level of support for bicycling for both commuting and recreation, bike facility design standards are rarely backed by

As crashes rise, distracted driving has (mostly) stayed the same

By Chris McCahill Are cell phones to blame for rising traffic deaths? We have looked for evidence before and came up empty-handed. A new study from the Insurance Institute for Highway Safety suggests that drivers are just as distracted now as they were a few years ago, but some are swapping old

Is working from home really reducing VMT?

By Saumya Jain Several companies worldwide are now trying various strategies for reducing energy consumption, environmental impacts, overhead costs, etc. One such up and coming strategy involves transportation demand management solutions like teleworking and flexible schedules. With advancement

When will everyone have a Connected Autonomous Vehicle?

By Saumya Jain Although many car makers and future thinkers imagine the rapid adoption of connected and autonomous vehicles (CAVs), a recent study, conducted at the FedEx Institute of Technology at the University of Memphis, suggests that buyers may not be so eager to own one. Significant

Red light cameras save lives. Turning them off puts lives at risk.

By Michel Brenneis More than half of the fatalities caused by red light runners are pedestrians, cyclists, other motorists, or passengers. Red light running resulted in 811 fatal crashes in 2016, an increase of 17 percent from 2012 when there were 719 fatal crashes, reports the Insurance