Project Title: Evaluation of Speed Activated Displays and Low Cost Treatments on Rural Curves
Principal Investigator (PI): Shauna Hallmark
PI Institution: Iowa State University
PI email: firstname.lastname@example.org
PI phone: (515) 294-5249
Sponsor: USDOT,Iowa DOT, Iowa Highway Research Board, and the Midwest Transportation Consortium
Project budget / award:$760,328
Project dates: September 2007 to July 2012
This project is a national demonstration project to evaluate the effectiveness of dynamic speed signs on high crash curves on two-lane rural roadways in seven states to decrease speeds and reduce crashes. The team has installed and is monitoring signs in Texas, Washington, Florida, Arizona, Ohio, Oregon, and Iowa on high crash curve locations on two-lane rural roadways. Low cost strategies, including adding additional reflectorized treatments to existing chevrons and on-pavement curve warning signs, were evaluated in Iowa.
Why was this project important (i.e., reason for conducting project or benefit)? Nearly 58 percentof roadway fatalities are lane departureswith a large percentage occurring on rural two-lane roadways. Curves in general are problematic because they have three times the crash rate of tangent sections. Speed is also a major factor in fatal crashes. Consequently, focused attention on reducing speed on curves will result in improved safety.
Is this project transformational or translational in nature (or basic, advanced, or applied)? Applied
Key outcomes from the project: Interim report and conference paper (TRB)
Were the results of this project directly implemented and, if so, briefly how? Project is ongoing
What mode(s) does this project address (e.g., highway, transit, rail, air, water, bike, ped)? Highway
Is this project multi-disciplinary? What discipline(s)? No
Was this project conducted in collaboration with more than one institution? Yes, Texas A&M Transportation Institute (TTI) and Portland State University (PSU) partnered with Iowa State University.