research

Climate change killing us in more ways than expected?

By Saumya Jain While the positive relationship between traffic crashes and extreme summer conditions is certainly not unheard of, it is rarely used in practice when designing policies or issuing roadway safety warnings. A recent study in Accident Analysis and Prevention shows that heat waves have

Could transit service cuts be responsible for declining ridership?

By Rayla Bellis It is no secret that transit ridership has declined in recent years in many cities in the U.S. after years of increases. Ridership dropped by 2.5 percent nationwide from 2016 to 2017. While some have speculated that this decline is due to decreasing gas prices or competition from

Estimating the amount people drive based on accessibility measures

By Logan Dredske How does the built environment influence the amount people drive? Research by SSTI’s Logan Dredske worked to answer this very question. The focus of his research was to create a framework for estimating vehicle miles traveled based on conditions of the built environment. His

International review confirms speed management is critical to road safety

By Chris McCahill Speed reductions can lower crash risks significantly, confirms a new report by the International Transport Forum, an intergovernmental organization of 59 member countries including the U.S. The research report, Speed and Crash Risk, looks at 11 case studies in 10 different

Hit-and-run crashes are on the rise

By Michael Brenneis Hit-and–run fatal crashes are increasing in the United States. Why? The short answer is that we don’t entirely know. Studies are limited, and data regarding the characteristics of drivers and victims is not extensive. Many hit-and-run drivers get away. Witnesses may not be

Research finds R1-6 gateway treatment can rival RFFB and PHB lights at pedestrian crossings

By Robbie Webber Research in Michigan has shown that in-street, yield-to-pedestrian signs can affect both yielding behavior and driver speeds approaching crosswalks to the same degree as installation of a Rectangular Rapid Flashing Beacon (RFFB) or Pedestrian Hybrid Beacon (PHB.) This is good

Study of bicycling and driving behavior reveals areas for improvement

By Robbie Webber A new report based on research by the USF Center for Urban Transportation Research and sponsored by Florida DOT details new methods for studying bicycling safety by mounting cameras and sensors on bikes ridden in naturalistic settings. The research gives us insight into the

Where people walk: Two new studies improve “walkability” measurement

By Chris McCahill In planning and designing for pedestrians, sidewalks are often a good start but rarely make a place walkable on their own. Measuring pedestrian accessibility (the topic of a recent SSTI webinar) depends on two important pieces of information: 1) where destinations are located,

What is ride-hailing doing to our transportation system?

By Robbie Webber A new study from the Institute of Transportation Studies at University of California–Davis delves into the effects of ride-hailing (Uber and Lyft) use on other parts of our transportation system. What they find confirms some assumptions and disproves others. Interrelationships

CAFE standards may be easier to meet than previously thought

By Sam Sklar Consumers might favor vehicles that accelerate a little slower, if the vehicles are also much more fuel conscious and greenhouse gas friendly. That is the conclusion of a study published in Environmental Science & Technology by researchers at Carnegie Mellon, UC-Berkeley, and