A system of vehicular movement warning devices is described that might improve to some extent the safety of grade crossing operations. Two methods are detailed. One involves static directional sonic devices positioned at the crossing; warning activation is made on a real-time closing velocity determination. The other system employs a special variety of cattle guard in the roadway, to issue a tactile warning. Both systems are designed to give adequate warning to a motorist in a critical encounter situation as he approaches the crossing with a convergent locomotive on the track(s). A bonus feature in the use of selectively activated static directional sound warning sources would be the curtailment of urban noise levels, where trains presently use the mobile audible source to issue warnings.

  • Corporate Authors:

    Institute of Electrical and Electronics Engineers (IEEE)

    3 Park Avenue, 17th Floor
    New York, NY  United States  10016-5997
  • Authors:
    • Longrigg, P
  • Publication Date: 1975-4

Media Info

Subject/Index Terms

Filing Info

  • Accession Number: 00095515
  • Record Type: Publication
  • Files: TRIS
  • Created Date: Jun 10 1975 12:00AM