Cooperative Adaptive Cruise Control: Testing Drivers' Choices of Following Distances

A Cooperative Adaptive Cruise Control (CACC) system has been developed by adding a wireless vehicle-vehicle communication system and new control logic to an existing commercially available adaptive cruise control (ACC) system. The CACC is intended to enhance the vehicle-following capabilities of ACC so that drivers will be comfortable using it at shorter vehicle-following gaps than ACC. This can offer a significant opportunity to increase traffic flow density and efficiency without compromising safety or expanding roadway infrastructure. This report describes the design and implementation of the CACC system on two Infiniti FX-45 test vehicles, as well as the data acquisition system that has been installed to measure how drivers use the system, so that the impacts of such a system on highway traffic flow capacity and stability can be estimated. The results of quantitative performance testing of the CACC on a test track are presented, followed by the experimental protocol for on-road testing with human subjects. Finally, the results from the field testing by 16 naïve drivers are presented to show the user acceptance and quantitative measurements of how these drivers used the ACC and CACC systems, and how these systems affected their choice of car following gap.

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    University of California, Berkeley

    Institute of Transportation Studies Library
    Berkeley, CA  United States  94720

    University of California, Berkeley

    California PATH Program, Institute of Transportation Studies
    Richmond Field Station, 1357 South 46th Street
    Richmond, CA  United States  94804-4648

    California Department of Transportation

    1120 N Street
    Sacramento, CA  United States  95814
  • Authors:
    • Nowakowski, Christopher
    • Shladover, Steven E
    • Cody, Delphine
    • Bu, Fanping
    • O'Connell, Jessica
    • Spring, John
    • Dickey, Susan
    • Nelson, David
  • Publication Date: 2011-1


  • English

Media Info

  • Media Type: Digital/other
  • Features: Appendices; Figures; Glossary; Photos; References; Tables;
  • Pagination: 171p
  • Serial:

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Filing Info

  • Accession Number: 01330099
  • Record Type: Publication
  • Source Agency: UC Berkeley Transportation Library
  • Report/Paper Numbers: UCB-ITS-PRR-2011-01
  • Contract Numbers: DTFH61-07-H-00038329
  • Created Date: Feb 22 2011 11:27AM