Forward Collision Warning Algorithm Based on Road Condition Information and Driver Characteristics

Forward collision warning systems are used primarily to prevent rear-end crashes with a moving or parked vehicle. This type of accident represents 30% of all accidents in Japan. This paper considers the development of a forward collision warning algorithm. The authors note that previously developed algorithms are based on Pre-Crash Safety system concept which activates in critical driving situation. They contend that the collision warning device should be designed to be activated earlier than the current pre-crash safety system in order to induce driver’s own braking maneuver. This will work to prevent collisions as well as near-miss traffic incidents. The authors describe their forward collision warning algorithm which is based on road friction coefficient and driver characteristics. They verified the effectiveness of the algorithm by using driving simulator experiments and instrumented cars in urban area.