Expanded Development for Enhanced Rear Signaling

Previous phases of the enhanced rear signaling (ERS) for Heavy Trucks project investigated methods to reduce or mitigate those crashes where a heavy truck has been struck in the rear by another vehicle. These collisions result in higher-than-usual fatality and injury rates compared to collisions involving lighter lead vehicles. Two types of systems were developed in previous phases. The closed-loop system triggers the ERS system using velocity and closing distance of the following vehicle, along with lead-vehicle velocity and deceleration. The open-loop system triggers the ERS systems using only lead-vehicle's deceleration. The results of previous ERS testing in real-world driving situations during real-world data collection, indicated that the system performed well at detecting and signaling rear-end crash threats and drawing the gaze of following-vehicle drivers to the forward roadway. There were minor following-vehicle unintended consequences recorded during daylight hour testing (i.e., light accelerations and decelerations); however, no difference was found between the ERS and baseline conditions. Prior to data collection in a FOT, the potential need for rear warning- light brightness adjustments for lower-light conditions should be investigated. Additionally, a limitation was found in the closed-loop activation sub-system testing at lower speeds in high- traffic-density scenarios. The radar was not robust in identifying targets at low speeds in high traffic density conditions, which resulted in a high number of false alarms in this scenario.

  • Supplemental Notes:
    • Program Information: Improve Safety of CMVs


  • English


  • Status: Active
  • Sponsor Organizations:

    Department of Transportation

    Federal Motor Carrier Safety Administration
    1200 New Jersey Avenue, SE
    Washington, DC    20590
  • Project Managers:

    Mueller, Jon

  • Performing Organizations:

    Virginia Polytechnic Institute and State University, Blacksburg

    Office of Sponsored Programs
    1880 Pratt Drive, Suite 2006
    Blacksburg, VA  United States  24061
  • Principal Investigators:

    Bowman, Darrell

  • Start Date: 20110930
  • Expected Completion Date: 0
  • Actual Completion Date: 20120930
  • Source Data: RiP Project 30672

Subject/Index Terms

Filing Info

  • Accession Number: 01467645
  • Record Type: Research project
  • Source Agency: Department of Transportation
  • Files: RiP, USDOT
  • Created Date: Jan 3 2013 3:36PM