Collision Avoidance systems are one of the great challenges in the area of active safety for automobiles. Their function is to allow the driver enough time to avoid the crash. The frequency at which traffic collisions are reported is highest in India.The problem of road accidents is needed to be stopped at an
early stage otherwise they might cause huge problems. This paper reviews various developed and proposed mechanisms of collision avoidance systems of automobiles. Collision avoidance systems include sensors which sense the obstacles in the path and make vehicle to come to a stop. A review of three algorithms namely those of Honda, Mazda and Berkeley reveals that all these collision avoidance systems are based on intelligent sensor technology,
which automatically intervene to initiate actions designed to avoid collision. Each algorithm is adapted to a particular situation.
Collision Avoidance, Automobiles, Sensors