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Edition:Final report.
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Abstract:The Oregon Department of Transportation (ODOT) requires performance and durability testing of all pavement
marking materials before they can be applied on construction projects on state highways. Manufacturers apply materials
on a two-year test deck where the product is evaluated regularly until a determination can be made regarding the
suitability of the marking material. If it is determined that the material is suitable, it is included on the Qualified
Products List (QPL). The testing and evaluation on ODOT test decks are limited to measuring the thickness of the
marking material; assessing dry weather retroreflectivity; and subjective evaluations of appearance and durability. It
was determined that a review of pavement marking testing procedures especially those followed in states with climatic
conditions similar to Oregon could be useful. The research project includes recommendations to enhance the pavement
marking testing and selection process. The recommendations relate to application procedures, monitoring and
evaluation, and final selection of products. Proposed minimum retroreflectivity requirements are discussed.
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