Off-road axle detection sensor (ORADS) : occlusion feasibility study, final technical report, 27 August, 1997.
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Off-road axle detection sensor (ORADS) : occlusion feasibility study, final technical report, 27 August, 1997.

  • 1997-08-27

Filetype[PDF-892.01 KB]


  • English

  • Details:

    • Alternative Title:
      Off-road axle detection sensor (ORADS) : occlusion feasibility study, final technical report, August 27, 1997 ; Off-road axle detection sensor (ORADS) occlusion feasibility study, state job no. 14669(0) : final technical report, 27 August, 1997 ; Off-road axle detection sensor (ORADS) occlusion feasibility study, state job no. 14669(0) : final technical report, August 27, 1997 ;
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    • OCLC Number:
      664248685
    • Edition:
      Final report.
    • Corporate Publisher:
    • NTL Classification:
      NTL-OPERATIONS AND TRAFFIC CONTROLS-Traffic Flow ; NTL-OPERATIONS AND TRAFFIC CONTROLS-Traffic Control Devices ;
    • Abstract:
      The work accomplished under this initiative is in direct relation to the development effort proposed by Spectra Research, Inc. (S*R) for an "Off-Road Axle Detection Sensor (ORADS)". The feasibility study was performed to investigate potential occlusions that may arise from the use of a laser-radar (LADAR) based sensor configuration. This feasibility study was suggested to determine any potential risk in the development. S*R was awarded a contract to perform video analysis work over a six month period. S*R performed video tests to visually inspect situations under which occlusion may occur during peak, unidirectional traffic flow on a highly populated, multiple lane interstate. The test site was selected by ODOT representatives, 1-275 northbound at exit 46 during peak traffic times (4-6 p.m.). Data was collected for approximately one hour using two video cameras. Camera 1 was used to record on-coming traffic for lane and volume data. Camera 2 was positioned to act as the LADAR sensor to provide axle count and occlusion data. The results of this effort show that across a multiple lane roadway exhibiting high volume traffic flow, the aggregate probability of axle occlusion is 4.21%. These results were anticipated and conform to the error requirements ( 4 0%) identified by ODOT officials. Recommendation is made for further funding of the ORADS Phase II development.
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