News

Real-time travel information: Better for businesses, better for travelers

By Logan Dredske Real-time travel information on digital screens placed in popular gathering areas allows for more efficient time management by transportation users of all modes. Tysons Corner Center, a shopping center in northern Virginia, uses Traveler Information Displays (TIDs) that provide

What HOV requirements in Jakarta can teach us about congestion

By Sam Sklar According to a new paper from three researchers at Harvard and MIT, removal of a strict High-Occupancy Vehicle (HOV) policy had negative effects on traffic in Jakarta, Indonesia, the world’s second largest metropolitan area. Congestion increased even on streets with no

Cleaning up the commercial diesel truck industry

By Logan Dredske In 2011, U.S. EPA and NHTSA established a national program to reduce greenhouse gas emissions and set new fuel efficiency standards for commercial vehicles starting in 2014. The requirements of this program are a driving force that is causing manufacturers to advance diesel

A toolkit to measure and value “community severance” due to traffic

By Erin Evenhouse A high-traffic road can divide a community in more ways than one. Researchers haven’t always been able to show to what extent such roads can harm a community’s access, health, or quality of life. A new study outlined in the latest volume of the Journal of Transport and

Does legalized marijuana lead to more car crashes?

By Rayla Bellis As more states legalize recreational use of marijuana, decision makers are seeking to understand the implications for safety and public policy. A number of recent studies have examined whether states that have legalized marijuana are seeing higher incidence of car crashes and road

Safety in numbers and safety by design: A ‘virtuous cycle’

By Chris McCahill Two recent studies reiterate what makes safer walking environments: more pedestrians, according to one; and well-connected networks of local streets, according to the other. Taken together, these studies build upon growing evidence that the safety benefits of cities designed for

Alcohol and gasoline prices: Their impact on traffic fatalities and the economy

By Logan Dredske Alcohol and gasoline prices are having unexpected impacts on traffic fatalities, as well as causing damage to economies. A study by Onyumbe Enumbe B. Lukongo, an economics professor at Southern University and A&M College in Louisiana, explored the relationship between per

UConn research center sets new standard with crash data and analysis tool

By Mary Ebeling Access to current and comprehensive crash data provides essential information for anyone seeking to improve the safety of road users. At the state and local level this type of data tool is not widely available to transportation safety engineers, law enforcement, local and regional

Accessibility for all: Open source options for measuring access to destinations

By Chris McCahill As highlighted in two recent SSTI webinars in March and April of this year, accessibility measures are becoming more useful in practice. The most notable examples rely on proprietary data and methods, but open source approaches are also gaining traction, while highlighting the

Can autonomous vehicles co-exist with bicyclists and pedestrians?

By Robbie Webber While major automakers rush to promote the next level of autonomous features and release videos of hand-free driving, serious questions have been raised about whether autonomous vehicles will be able to safely co-exist with bicyclists and pedestrians. Heather Knight, an expert in