2.8 Estimating the roughness of unpaved roads

Agencies responsible for road maintenance and planning must be able to assess road roughness. Road roughness affects vehicle safety, comfort and speed of travel, and thus the rate of wear of vehicle parts and, in turn, vehicle operating costs.

Instrumented measurement of roughness is desirable, but not feasible for unpaved roads. In these instances a subjective estimation is needed. This paper presents two possible approaches based on the World Bank's work with the Highway Design and Maintenance Standards Models (HDMIII, and HDM-4).

Issuing body: World Bank
Type: Technical paper
Unpaved roads' roughness estimation by subjective evaluation
File type:
File size: 28.84 KB
Year of publication: 1999
Number of pages: 3