The ARAN unit, one of which has been purchased by the Texas State Department of Highways and Public Transportation (SDHPT), is a multi-function, road-quality surveying instrument. The instrument includes a pavement surface roughness measuring subsystem, a rut depth and transverse profile measuring subsystem, a gyro subsystem, a right-of-way videologging subsystem, a pavement condition videologging subsystem, and a pavement rating subsystem. To enhance the understanding of the response of the instrument (so as to apply it more efficiently to pavement management), the Center for Transportation Research (CTR) of The University of Texas at Austin has conducted a comprehensive evaluation. The report describes the procedures, methodologies, and results from the evaluation of the pavement roughness measuring subsystem of the ARAN unit. The main activities described and discussed are the field tests and data collection, the repeatability test of the roughness subsystem, the effect of the report interval on the roughness statistics, the correlation analysis and calibration models developed, the new PSI models developed, the effect of the operational speed on the roughness statistics, and the speed-effect-cancelling models developed.


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    Lu, J. J. / National University of Singapore; Centre for Transportation Research | British Library Conference Proceedings | 1995


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