Author(s)

J. Korolis, M. Young, A.S. Blicblau & KJ. McManus

Abstract

The Anti-lock Braking System (ABS) fitted to modern passenger vehicles is intended to provide reliable and efficient braking under critical road conditions or in an emergency. However, the braking dynamics of a vehicle vary greatly depending on the road surface. On an unsealed road surface an ABS equipped vehicle will behave quite differently from vehicles without ABS. The braking distance on gravel or snow covered roads is less for systems without ABS. In this situation a snow or gravel wedge is responsible for an additional braking effect with locked wheels. In an ABS system, the formation of the wedge results in the unlocking of the brakes and the vehicle rolls over the wedge. Using a laser slit line projected longitudinally on the wheel and observing deformat

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