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Safety Product Performance Evaluations

Sequential Dynamic Curve Warning System (Traffic and Parking Control Company (TAPCO)

Horizontal Curves make up a small percentage of total road miles, yet account for one-quarter of all highway fatalities. The majority of crashes on curves involve lane departures. The Sequential Dynamic Curve Warning System consists of a series of solar-powered, LED-enhanced BlinkerSigns (a Curve Warning BlinkerSign and an array of Chevron BlinkerSigns) that are installed throughout a curve. Approaching vehicles, sensed by radar or other ITS device, trigger the controller that wirelessly activates the LED signs to flash sequentially through the curve to warn speeding drivers to slow down. The field study will evaluate the effectiveness of the technology in reducing vehicle speeds and in reducing the frequency and/or the severity of curve-related crashes. Participating State DOT's include Missouri, Texas, Washington, Wisconsin, and Colorado. Estimated completion date: December 2013.

Publications

Presentations

Project Contact

Omar Smadi
Center for Transportation Research and Education
(515) 294-7110
Smadi@iastate.edu

Page last modified on January 27, 2017
Federal Highway Administration | 1200 New Jersey Avenue, SE | Washington, DC 20590 | 202-366-4000