With the advent of key performance indicators and performance specified maintenance contracts (PSMC), both in New Zealand and abroad, the accuracy, repeatability and reproducibility of roughness data is coming under increased scrutiny. Continuity of the service provider and their equipment has proven to assist in obtaining repeatable results. For calibration it is necessary to provide a reference roughness. This provides the road controlling authority with confidence that the equipment is calibrated correctly prior to the roughness survey being undertaken on their network. There are a variety of instruments available for calibration level surveys, each with different levels of accuracy and precision. This research assesses and evaluates the accuracy of these different instruments, which range from low to high cost methods, for establishing the reference roughness on selected calibration sites. (Author/publisher) For the covering entry of this conference, please see ITRD abstract no. E213531.
Samenvatting