Pavement Macrotexture Guideline PDF Download

"This pavement macrotexture guideline is for highway engineers and administrators concerned with the improvement of pavement surface texture as a countermeasure for skidding accidents. A summary is presented of the fundamentals of tire-pavement skid resistance and the importance of pavement surface texture in reducing skidding accidents. This includes a discussion of the skid number and skid number-speed gradient and of the role of pavement surface microtexture and macrotexture in skid resistance. The most commonly used methods of measuring pavement macrotexture are described, and ways of achieving high macrotexture in new pavements and of restoring high macrotexture in existing pavements are given. Higher macrotexture in new pavements can be obtained using open-graded asphalt surface courses and texturing of portland cement concrete surfaces; higher macrotexture in existing surfaces is achieved from open-graded asphalt overlays, pavement grooving, cold milling, and seal coats. The cost-effectiveness considerations in selecting high macrotexture pavement surfaces are also discussed"--Technical report documentation p.