Practical Method for Locked-Wheel and CFME Friction Measurement Interconversion

Abstract

Pavement friction have become a characteristic of interest due to its impact on road safety. The demand of the transportation agencies for equipment to measure the friction of their pavements grew. Different companies developed in parallel way different devices to satisfy that demand. This generate that the different transportation agencies are using different devices to measure the same characteristic. In order to determine a threshold for the adequate friction levels, the need to compare those data was created. Several attempts to harmonize those measurements have been developed, but have demonstrate that not produce harmonious results among some devices. Also, there are new equipment like the Continuous Friction Measurement Equipment (CFME) that offer some advantages compared to the traditional Locked Wheel Trailer (LWST) that also generate the need to compare historical data to the collected with the new device. This thesis is proposing an interconversion method between the measurements from a CFME as the SCRIM and the LWST.