Engineers at the Virginia Department of Transportation (VDOT) are studying a new type of asphalt mixture, called recycled plastic modified asphalt mixture (RPM), that could replace traditional asphalt mix. While limited research on the technology says it is a win-win for both improving longevity of roads and redirecting plastic waste from landfills, VDOT wants to confirm that the new mixture does not result in microplastic entering the environment through water runoff.
DOTs
PennDOT works to dismantle systemic racism
The Pennsylvania DOT recently unveiled a report from its Dismantling Systemic Racism and Inequities Working Group that details recommendations to establish anti-racist principles at the core of the work done by the DOT. Collecting input from the community, staff, leadership, and other DOTs, the report lays out strategies to balance the PennDOT workforce, invest in disadvantaged communities, reduce disparity in contracting, engage with communities of color, and increase diversity on advisory boards and commissions.
DOTs are thinking beyond highways for keeping economies moving
Construction of the Interstate Highway System spawned decades of economic growth in the U.S., but building more of the same will have diminishing returns, according to research outlined recently in the Wall Street Journal and the National Review. If it’s true that “you can’t build the Interstate Highway System twice” and expect the same benefits, then it’s worth understanding the different ways that DOTs are investing and thinking about how they can keep the economy moving.
Traffic studies drive housing development to the fringe
Traffic impact assessments (TIAs) are commonly used by local governments to ensure that new developments do not cause excessive delay on nearby roads. There is growing cause for concern, however, that these tools have unintended consequences such as increasing transportation emissions and driving up housing costs.
Small investments can go a long way towards safer, inclusive streets
There is a growing public clamor for better access by people to the places where they live, work, and spend their recreational time. However, a majority of transportation investments are spent on moving people through places, typically by driving.
Safer systems are needed to curb traffic deaths
The U.S. needs to adopt a “Safe System” approach to reduce traffic deaths and serious injuries, according to the Institute of Transportation Engineers and policy experts at Johns Hopkins University. “Our current roadway system reflects a history of flawed decisions about land use, opportunity, investment, and racial and ethnic equity,” they write in a recent issue of ITE Journal, pointing to the impressive safety records in Australia, New Zealand, Spain, Sweden, and other countries that adopted the approach early on.
Colorado DOT navigates its legacy mission and clean energy goals
State DOTs are essential participants in the fight against climate change, but also face competing demands. For the Colorado DOT (CDOT), that means navigating its responsibilities to maintain and improve existing highways, improve rural access, and reduce congestion, all while reducing greenhouse emissions.
Three steps toward smarter transportation investments
A new study by SSTI with researchers from the Civil and Environmental Engineering Department at the University of Wisconsin-Madison looks at transportation project prioritization programs at 21 agencies across the U.S. The study identifies three overarching strategies to better align investments with policy goals: 1) establishing flexible funding programs; 2) evaluating key outcomes; and 3) maximizing benefits per dollar spent.
Transportation professionals call for improved standards
As the window closes for comments on the eleventh edition of the Federal Highway Administration’s Manual on Uniform Traffic Control Devices (MUTCD)—the national standard governing all traffic control devices—strong criticism of the manual is coming from industry professionals and safety advocates alike.
Keeping roads and bridges intact requires widespread support
One out of every five miles of road in the U.S. is in poor condition and less than half are rated as “good,” and their condition is just getting worse. Transportation agencies in some states have committed to turning things around by prioritizing maintenance in their spending plans.