Specifications include, but are not limited to: A. General: • 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 retroflective 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 300. 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.; E. Beads: • Provide ceramic beads on the surface of the material that have a minimum index of refraction of 1.7 when tested according to ASTM E 1967. Provide glass beads, that when mixed into pliant polymer, have a minimum index of 1.5 when tested according to ASTM E 1967.; F. Patchability: • Provide film capable of being patched using the same type of material.; G. Reflectance: • Provide markings that have minimum initial retro reflectance values specified in Table 880-05 when measured according to ASTM D 4061. Measure specific luminance (SL) expressed as millicandelas per square foot per foot candle. Use a 50 foot test distance and a sample size of a 2.0 x 2.5 foot rectangle.
