Requirements & evaluation of friction information for the integration in vehicle systems

Increasing levels of automation in driver assistance systems (DAS) require safeguarding the steer and brake intervention in order to further prevent accidents. Special attention must be given to the interaction between tires and road surface. The friction coefficient between road (μ) and tires has a significant impact on driving performance and safety. Figure 1 illustrates that a very high percentage of the accidents happen in wet, snowy or icy road conditions.