Purdue university and the indiana department of transportation have evaluated the performance of a profile and rut depth (prorut) device developed by the university of michigan transportation research institute. Several pavement sections with different characteristics were included in the evaluation. Accurate profiles were determined with manual surveying techniques. Subsequently, the prorut device was operated over the same pavement sections and an analysis was made to find the variance of the results. The prorut profiles agreed closely with the rodand level survey profiles in all cases except for one chip and seal section. Improvements were suggested to enhance the prorut operation. This paper appears intransportation research record no. 1260, Measurement of pavement surface condition 1990.
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