The project goal was to evaluate different methods of cutting recessed skip stripe grooves, and to evaluate various pavement marking materials placed into the recesses. The project objective was to find a marking system for our mountain pass highways that would tolerate snowplowing and sanding operations, studded tires, and chain wear.
Three methods of pavement grooving and three types of marking material were evaluated over a four-year period. The grooving methods were evaluated with regard to production rate, the quality of the finished groove, and cost. The marking materials were checked for ease of installation, cost durability, and visibility.
One method of grooving was found that produced the desired recess shape at a reasonable cost and in a timely manner. All three of the marking materials were durable enough to survive for three years, but none produced the desired wet-daytime or wet-night visibility needed for adequate lane delineation. This loss of visibility under wet conditions was due to the lack of retroreflectance from the marking materials.