A Study of Detector Reliability for a Safety Warning System on the Gulf Freeway

Details

• Creators:
  Dudek, Conrad L. ; Dutt, Amitabh ; Messer, Carroll J. ; Ritch, Gene P.
• Corporate Creators:
  Texas Transportation Institute. Texas A&M University
• Corporate Contributors:
  Texas Highway Department ; United States. Department of Transportation. Federal Highway Administration
• Subject/TRT Terms:
  • Highway traffic control systems
  • Freeways
  • Traffic surveillance
  • Traveler information and communication systems
  • Driver information systems
  • Vehicle detectors
  • Reliability
  • Traffic safety
  • Warning devices
• Publication/ Report Number:
  165-7
• Resource Type:
  Tech Report
• Geographical Coverage:
  Texas ; United States
• Edition:
  Interim- September, 1971 - November, 1974
• Corporate Publisher:
  Texas Transportation Institute. Texas A&M University
• Abstract:
  An experimental warning system has been installed on the Gulf Freeway in Houston as a means of alerting drivers approaching crest type vertical curves of stoppages downstream of the crest. Successful automatic operation of the warning system is dependent upon the reliability of the system components. Earlier studies showed that the developed control logic is responsive to stoppage waves providing the hardware functions properly. The studies also indicated a relatively high frequency of detector failures. The frequency of detector failures prompted a study to evaluate the reliability of the warning system based on the detector failure and repair rates experienced on the Gulf Freeway surveillance and control system to ascertain whether detector redundancy or improved maintenance would be necessary. Classical models relating to reliability of maintained and non-maintained systems were employed. Reliability functions for warning signs installed at isolated locations are also presented.
• Format:
  PDF
• Funding:
  2-8-72-165
• Download URL:
  https://rosap.ntl.bts.gov/view/dot/85272/dot_85272_DS1.pdf
• File Type:
  [PDF - 1.65 MB]
• Collection(s):
  US Transportation Collection
• Main Document Checksum:
  urn:sha-512:f39f5eca3596526a8e97d70c86c6e6a392292084dafe0991b41a2866cc8ac1ab87271344ac2794bf2b997934ce9e890b27fe623020ea051d21428de504da7f90