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Roadway sensor systems

  • US 5,450,077 A
  • Filed: 08/07/1992
  • Issued: 09/12/1995
  • Est. Priority Date: 05/03/1989
  • Status: Expired due to Fees
First Claim
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1. In a linear roadway vehicle sensor for sensing vehicular traffic thereover, the improvement comprising, a flexible carrier member comprising an elongated flat elastomeric member having upper and lower surfaces, and a leading edge, a linear recess formed in said flexible carrier, linear weight means distributed along the length of said flexible carrier member and means securing said linear weight means in said recess in said flexible carrier member, said linear weight means having a weight per unit length which is sufficient to maintain said sensor on said roadway and substantially immune to lifting from the roadway because of air flow effects and turbulence caused by vehicles, said linear weight means being able to adapt to undulations and curvatures in said roadway and does not bounce up and down because of roadway traffic, and a sensor passage formed in said carrier and at least one elongated pressure sensor means carried in said sensor passage.

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