This report describes a study designed to establish the accuracy and repeatability of high-speed, road-profiling equipment. This effort focused on a series of roughness validation sites. The study addresses selecting the appropriate sites, determining the "true" or reference profiles for these sites, implementing high-speed testing procedures, and developing a method for processing profiles and reducing the corresponding roughness indices. The findings suggest that laser-equipped, high-speed inertial profilers, driven by skilled operators, are capable of providing exceptional levels of repeatability within an acceptable bias for a standard reference device (the Face Companies' Dipstick®). The study further offers some preliminary repeatability and accuracy goals for equipment used to conduct construction acceptance testing (for smoothness) as well as for network roughness surveys.
Measuring the surface roughness of freshly constructed pavements is common practice to ensure that the appropriate agency specifications are met. Cont...
The Ohio Department of Transportation (ODOT) needs to evaluate highway structures’ performance supported on spread footings bearing on soils. This e...
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United States Department of Transportation
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