For the last twenty-five years considerable research has been directed toward developing reliable equipment for evaluating pavement roughness. Since roughness inhibits passenger riding comfort and safety, as well as inducing vehicle deterioration, the determination of the features that cause roughness would indicate possible improvements in pavement design, materials, construction practices and equipment. For example, certain types of base design might be found to produce smoother surfaces than others; and a construction practice such as a blade-spread leveling course might result in more uniform pavements. Then too, evaluation of pavement roughness would permit relative comparison of pavements as one of several factors in determining the most needed of possible improvements, with the normally limited finances available. This could appear in a tabulation of sufficiency ratings such as those used by the Kentucky Department of Highway.

Report Date


Report Number

No. 117

Digital Object Identifier