5,000 km Field Test of iRoad Pavement Friction Tester

In April 2024, iRoad's self-developed pavement friction coefficient tester completed a 5,000 km field inspection program covering a wide range of real road conditions.

Why a long-distance field test

Laboratory calibration confirms performance under controlled conditions. Continuous operation on real roads is the true test of an inspection system's durability and data stability.

Road conditions covered

- Expressways, where data must remain continuous and accurate at higher driving speeds- Urban and rural roads, with mixed surface materials and frequent stops- Joints between new and old pavements, with stiffness differences and settlement transitions- Rough construction sections, testing vibration resistance and data filtering

How the work was organized

To avoid daytime traffic and protect the crew, the team worked mainly at night. Data collected each day was reviewed the same day for completeness and anomalies, so any issue could be found and fixed early.

Results

Over the full 5,000 km, the equipment operated stably and collected accurate, traceable data, with no precision drift or system failure from long continuous operation. The field data is now used to further optimize the measurement algorithms and adapt the equipment to more road conditions.

Related product: Pavement Friction Coefficient Tester