Study on Validity of Maximum Static Friction Coefficient as an Evaluation Value for Skid-Resistance of Pavement Surface

Kei Yamamoto; Osamu Takahashi

doi:10.7250/bjrbe.2026-21.681

Study on Validity of Maximum Static Friction Coefficient as an Evaluation Value for Skid-Resistance of Pavement Surface

Authors

Kei Yamamoto Gaeart Co., Ltd.
Osamu Takahashi Nagaoka University of Technology, Niigata, Japan

DOI:

https://doi.org/10.7250/bjrbe.2026-21.681

Keywords:

dynamic friction, friction, friction characteristic, pavement, skid-resistance, static friction

Abstract

The skid resistance of a pavement surface is a critical indicator of driving safety, typically quantified by the dynamic friction coefficient measured using a Friction Measurement Vehicle or a Dynamic Friction Tester. The dynamic friction coefficient is calculated from the dynamic friction force acting on a rubber slider in a sliding state, directly influencing the braking distance before a tire stops sliding. In this study, we hypothesize that the resistance force before a tire begins to slip – rather than the braking distance – is more closely related to traffic accident risk. Therefore, this study focuses on the maximum static friction coefficient, representing the resistance force at the onset of tire sliding. Maximum static friction coefficients were measured across various road surfaces and compared with dynamic friction coefficients to evaluate their relationship with accident risk. The results demonstrate that the maximum static friction coefficient provides a more realistic evaluation of road surface skid resistance.

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