Specifications include, but are not limited to: The markings shall be manufactured and packaged to permit storage at the manufacturer’s recommended shelf life for a period of not less than one year from the date of purchase. Legends and symbols shall meet the applicable shapes and sizes. B. Composition.•Provide retroreflective pliant polymer pavement markings that consist of a mixture of polymetric materials, pigments and glass beads distributed throughout its base cross-sectional area, with a reflective layer of ceramic beads bonded to a polyurethane topcoat surface. •Provide material with a patterned surface with between 35 and 65 percent of the surface area raised and presenting a near vertical face to traffic approaching from all directions. • Ensure the channels between the raised areas are substantially free of exposed beads or particles. • Provide material that has minimal exposed beads and particles between the raised areas. • Provide preformed markings that conform to pavement contours by the action of traffic. • Provide pavement markings applied using a pressure sensitive adhesive in accordance with the manufacturer’s instructions. Provide markings that are immediately ready for traffic after application. C. Skid Resistance. • Provide tape that has a surface that provides an initial minimum skid resistance value of 45 BPN when tested according to ASTM E 303. Obtain the values at downweb and at 45 degree angle from downweb. Average the two values to find the skid resistance of the patterned surface. D. Thickness. • Provide patterned material that, without adhesive, has a minimum thickness of 65 mils at the thickest portion of the patterned cross-section and minimum thickness of 20 mils at the thinnest portion of the cross-section.
