00376544

Component

http://onlinepubs.trb.org...s/trr/1983/898/898-027.pdf

https://scholar.google.co...iroz&publication_year=1983

Road roughness is highly correlated with serviceability and various components of user costs. Response-type systems (e.g., the Mays meter, the roughometer, and the bump integrator) are frequently used to measure roughness mainly because of their relatively low cost and high measuring speed, whereas a sophisticated device such as the Surface Dynamics Profilometer is necessary for calibrating those systems. An analysis of rod-and-level measurements of pavement profile is presented. Rod-and-level measurements represent a feasible alternative to the Profilometer in that they provide an accurate means for calibrating response-type roughness-measuring systems. Four different profile summary statistics from the literature are used to establish a stable roughness scale: wave amplitude, root mean square vertical acceleration (RMSVA) mean absolute vertical acceleration (MAVA), and slope variance. RMSVA computed for different base lengths is recommended for characterizing road roughness. Accurate RMSVA estimates can be obtained when a 500-mm sampling interval is used to collect pavement profile data with rod and level. It is found that rod-and-level measurements of pavement profile currently constitute the most feasible means for the general transfer of roughness standards. Moreover, the rod-and-level method is particularly appealing for developing countries, where the social costs of labor-intensive procedures may be significantly less than the costs of procedures that depend on sophisticated imported instruments. Rod-and-level measurements are very slow when a short sampling interval of 500-mm is used. Therefore, use of the method is recommended for keeping updated records of pavement roughness on about 20 control sections. These sections, in turn, can be used for calibrating response-type roughness-measuring instruments. (Author)

Publication of this paper sponsored by Committee on Low-Volume Roads. Distribution, posting, or copying of this PDF is strictly prohibited without written permission of the Transportation Research Board of the National Academy of Sciences. Unless otherwise indicated, all materials in this PDF are copyrighted by the National Academy of Sciences. Copyright © National Academy of Sciences. All rights reserved

00380954

N908

pp 181-188

1983

Transportation Research Record

Third International Conference on Low-Volume Roads

0309035112

Print

Figures (4) ; References (27) ; Tables (1)

Accuracy; Calibration; Developing countries; Labor costs; Roughness

Profiles

Geotechnology; Highways; Pavements; I23: Properties of Road Surfaces

TRIS, TRB

Aug 30 1983 12:00AM