This instrument is intended for professional field testing of pavement skid resistance and surface friction, providing continuous friction measurement under real-world, highway-speed conditions. It is especially useful for road authorities, pavement testing laboratories, contractors, and consultants who need objective data for maintenance planning, road safety assessment, and verification of completed works.
The measurement principle is based on the Side Force method defined by ASTM E670 and AASHTO T268. The device uses two ASTM E1551 reference tires mounted at a fixed angle relative to the direction of travel. During operation, the interaction between the tires and the pavement generates a lateral force that is proportional to the surface friction properties. This lateral force is measured via a load-measuring device, and the system directly converts the measured force into friction indicators for the tire–pavement interface. The result is a continuous friction profile along the test section, without the need for stopping or point-by-point measurements.
To ensure test conditions comparable to standard methods, the system can include a water delivery system for wet pavement simulation. Water supply systems are custom-built depending on the vehicle type and the required test distance, enabling consistent and repeatable water application throughout the measurement.
For advanced documentation and spatial analysis, an optional Pave®GPS is available. It links friction measurements to precise roadway position with a resolution/accuracy better than 1 meter, making it easier to identify critical zones, generate friction maps, and compare pavement condition over time (degradation trends).
System calibration can also be user-managed: the operator can perform calibration by purchasing a calibration pad and trolley, supporting measurement reliability and alignment with internal quality procedures. As an additional option, a precision tire pressure gauge can be supplied to monitor and maintain correct tire pressure—an important parameter for measurement stability and comparability.
