safety

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

New study finds AV tech less likely to detect darker-skinned pedestrians

By Marybeth McGinnis Clarification: This article should have made clear that the study “Predictive Inequity in Object Detection” examines camera-based machine-learning object detection systems, which are one component of full camera-lidar-radar based detection systems. In addition, the paper

Is bigger better?

By Michael Brenneis New analysis of Fatality Analysis Reporting System data by the Insurance Institute for Highway Safety (IIHS) points to crashes being more survivable for drivers of large SUVs than for drivers of smaller cars. Per million registered vehicle miles, driver deaths have been

Windshield bias among transportation professionals shifts safety burden onto pedestrians

By Chris McCahill Transportation professionals who spend more time behind the wheel tend to believe distracted walking plays an overstated role in pedestrian deaths, according to a new Rutgers study. This belief can steer professionals toward trying to correct pedestrian behavior, rather than

What states and cities can do to mitigate speeding during the pandemic

By Rayla Bellis Traffic volumes have plummeted since the pandemic. While that has led to fewer crashes overall in some states and cities, a growing number report large increases in speeding citations. In California, the number of tickets issued for driving above 100 miles per hour is 87 percent

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

Has reduced travel during the COVID-19 crisis made streets safer?

By Rayla Bellis As more data begins to emerge, COVID-19’s impact on traffic crashes and severity is proving complicated. Collisions and fatalities have declined in many places with data available, though not everywhere. However, collision rates and injury and fatality rates appear to be up in a

Cities open streets to create more space for walking, biking during pandemic

By Robbie Webber Cities across the country are restricting motor vehicle use on some streets and reallocating road space to give residents more space to move by foot and bicycle while still maintaining appropriate distancing during the COVID-19 pandemic. From New York to Burlington, VT, cities

The incompatibility of Vision Zero and VMT growth

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