Cold Plastic and Hot Thermoplastic, Foil-Back Tape, Removable Tape, and Paint Pavement Marking

摘要

Due to the large number of pavement marking materials proposed for evaluation, a test section was established on concrete pavement and another on asphalt pavement. Five 4' x 12' transverse stripes of each material, both white & yellow, were placed on each test section. An Ecolux retroflectometer was purchased and reflectivity measurements were made at preselected intervals. Durability, appearance, excessive wear, cracking, delamination, color retention, contrast, excessive dirt retention, application and removal were also recorded if pertinent. Since most of the Mississippi State Highway Department's reflectivity measurements were made on State Study No. 73, it was necessary to make a comparison with that placed on several other projects. The hot spray thermoplastic that was placed correctly is experiencing no difficulty. It reaches a plateau and maintains a consistent reflectivity throughout its life. Wear consists of cracks throughout the stripe and chipping along the edge. This causes the close-up appearance of the stripe to be poor but has little effect on the reflectivity.