Overhead traffic detector mounting system (Phase 2).
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Overhead traffic detector mounting system (Phase 2).

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  • English
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    • Creators:
    • Corporate Creators:
      University of California, Davis. Dept. of Mechanical and Aeronautical Engineering
    • Subject/TRT Terms:
    • Resource Type:
      Tech Report
    • Geographical Coverage:
      California
    • Corporate Publisher:
      California. Department of Transportation
    • Abstract:
      Caltrans has funded the development of a new family of out-of-pavement electronic sensing devices for the purpose of monitoring certain characteristics of highway traffic. One promising example is a laser based overhead detector recently developed at UC Davis, and jointly patented by Caltrans and UC Davis. In order to deploy this new generation of detectors, there is a need to develop the capability to safely and efficiently mount these devices above highway traffic lanes, using existing overhead bridges and sign structures as support.

      During the fiscal years 2000/2001 and 2001/2002, Caltrans funded a project whose main objective was to carry out a comprehensive engineering study of such a support platform. The project resulted in the complete design and construction of a working prototype of a trolley system that will carry the detection and monitoring devices that are under development or currently available.

      The project described in this report constitutes a second phase of the overhead traffic detector mounting project. One important objective of this phase is to design and build a portable collapsible truss that can be easily deployed for off-site testing of laser detectors or other detection devices. Another goal is to develop, construct, and test a reliable mechanism for mounting and dismounting the trolley system onto and down from the tracks on which it rides. Occasional mount and dismount of the platform system is necessary for instrument swapping and for instrument/platform maintenance. The third and final objective is to build an improved trolley system with an upgraded motion control system. The goal is to equip the motion control system with a sensor that can relay the platform’s position information to Caltrans personnel, and the ability to move the platform precisely to a commanded position above the roadway, without the need for visual feedback from an operator.

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    • Funding:
      65A0166
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