FEASIBLITY OF UTILIZING HIGHWAY BRIDGES TO WEIGH VEHICLES IN MOTION. EXOTIC SENSORS ON THE BRIDGE DECK

The object of this study was to determine the feasibility of utilizing highway bridges to weigh vehicles in motion. Specifically, the study was to determine the feasibility of developing a total system to acquire, record, and reduce in-motion collected vehicle data. Comprising dynamic axle load, dynamic truck load, static axle weight, vehicle weight, number of axles, axle spacing, headway, truck lane of occupany, truck type, and truck arrival time. Two forms of dynamic load sensors were investigated, direct-contact form which would sense directly from tire contact, and indirect forms, which measured a resultant bridge behavior effect. A total of nine forms of direct-contact transducers was identified which could be produced in one or both of two geometric designs which were developed. Of the indirect sensors, only seimic were investigated in depth. The study was constrained contractually from considering the classic strain gage approach. Study results indicated that a significant test and evaluation effort was necessary before a firm decision could be made on the practicality of using seismic sensors. All of the information collected on the use of seismic sensors was very favorable, but not sufficiently conclusive to commit to the fabrication of a sensor system.

  • Supplemental Notes:
    • Sponsored by FHWA and DOT.
  • Corporate Authors:

    Integrated Systems, Incorporated

    11880 Coakley Circle
    Rockville, MD  United States  20852
  • Authors:
    • Fothergill, J W
    • Childers, H D
    • Johnson, M A
  • Publication Date: 1974-11

Media Info

  • Pagination: 256 p.

Subject/Index Terms

Filing Info

  • Accession Number: 00139796
  • Record Type: Publication
  • Report/Paper Numbers: FHWA-RD-75- 33 Final Rpt., FCP 35F4-052
  • Contract Numbers: DOT-FH-11-8471
  • Files: TRIS
  • Created Date: Oct 6 1976 12:00AM