Ride Quality Testing Measuring Principle:
The longitudinal profile measurement is based on the "Dakota" method. An accelerometer is used to obtain vertical vehicle movement, and a laser sensor is used for measuring displacement between the vehicle body and pavement. Road profile measurements are then obtained by separating the body movement with the appropriate body displacements. IRI is calculated in accordance with World Specifications. The Measured longitudinal profile meets the Class 1 profile and bias specifications as defined by ASTM E-950.
The Dynatest Road Surface Profiler (RSP) is carefully designed to provide an advanced, automated, high-quality pavement roughness and related measurements solution for engineers nationwide. The RSP is capable of real-time continuous highway-speed measurements of longitudinal profile (International Roughness Index (IRI) and Ride Number (RN)), transverse profile, bumps, profile index (PI) number, rut depth, faulting, macro texture and geometrics (cross-fall, curvature and gradient). Measurements can be referenced with linear chainage or GPS, allowing easy integration to GIS.
Advantages of Using RoadTrac:
- Guaranteed high accuracy according to rigorous standards.
- Measurements taken at all traffic speeds.
- Easy calibration feature.
- Designed by pavement specialists.
- All indices are computed in real-time.
- Data collection in urban areas with "stop and go" feature.
- Dynatest worldwide support network.