Highway premarking guidance system

  • US 4,247,870 A
  • Filed: 11/06/1978
  • Issued: 01/27/1981
  • Est. Priority Date: 05/30/1977
  • Status: Expired due to Term
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First Claim
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1. Apparatus for use in marking a line along a roadway using a vehicle carrying paint marking apparatus, comprising:

  • a first set of at least two television cameras mounted on the vehicle and arranged to monitor the edges of the roadway;

    a television screen mounted on the vehicle; and

    means to arrange the images of the edges of the roadway on the screen in a predetermined relationship when the vehicle is in a predetermined location with respect to the edges of the roadway, said images being oriented to converge at a point, anda further television camera mounted centrally on the vehicle and arranged to monitor the vanishing point of the roadway, and means to arrange the image of the vanishing point centrally on the screen when the roadway is straight and the vehicle is located centrally thereon.

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