Abstract
Recent years witnessed a shift from the traditional methods of data collection required for pavement management system (PMS) to the automated ones. The cost of the automated methods is beyond the budgets allocated to most of the transportation agencies in the developing countries. This paper investigates the impact of the vehicle speed on the accuracy of rut depth measurement by using close range photogrammetry. Four highway sites were selected and videotaped by stereo-pair cameras mounted on the back of a vehicle travelling at constant speeds of 20, 30, 40, 50, 60, 70, and 80 km/h. Although, the study results indicate noticeable impact of vehicle speed on the accuracy of rut depth measurement, there is still prospect for improvements.