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System and Assessment of Reflective Objects Along a Roadway

  • US 20150153271A1
  • Filed: 10/13/2014
  • Published: 06/04/2015
  • Est. Priority Date: 08/12/2000
  • Status: Active Grant
First Claim
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1. A method for determining sheeting type of a reflective sheeting material covering at least a portion of a surface of a road sign comprising:

  • using a light source to illuminate at least a portion of the reflective sheeting material covering the road sign as the light source is traversed along the roadway;

    collecting a plurality of light intensity measurements reflected from the at least a portion of the reflective sheeting material to generate an as-measured retroreflectivity profile, the light intensity measurements corresponding to exemplary angular displacements of incident light from a reference position; and

    determining sheeting type of the reflective sheeting material based on the as-measured retroreflectivity profile.

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