IRI

Roughness Data

Using the latest technologies and industry standards, the PathRunner collection system includes a South Dakota type laser profiler manufactured based on active class 1 ASTM E950 standards. It collects the dynamic profile of the pavement surface that is used to calculate the pavement IRI roughness index and other indexes such as HRI and PSI. The sensors include one accelerometer on each wheel path, one laser sensor on each wheel path and a distance transducer.

TTI Certified

The system has also been certified at the Texas Transportation Institute and by Pathway Services' own stringent certification protocols.

Among other industry standards, quarter car simulation can be used to provide IRI data for both the left and right wheel paths. These pavement roughness indexes can be averaged and reported using different user-defined intervals (such as tenth of a mile, 100 feet, etc). The roughness data can also be classified into user definable low, medium and high severity ranges.

RoLine Capable

The onboard profiler also supports the high-speed RoLine 1130 sensors to provide a 100mm line of data across the road surface (similar to a tire width) for each wheelpath. The system offers numerous advantage over single pointor multi-point methods by capturing seeing more of the road to accurately measure on all pavement types at all posted speeds limits.

The high-speed 3kHz profile scans 100mm of scan width (or length depending on orientation) to provide both a full scan width or single-value using an internal bridging algorithm. The system is ideal for the many modern projects as it can provide accurate data on all pavement types including transverse and longitudinally tined concrete, grooved and diamond ground concrete, as well as asphalt pavements.

International Rutting Index