A study on the behavior of vehicles with rear wheels locked during braking

Mathematical models have been developed to predict swing behavior of vehicles with rear wheels locked during braking. From the model an exponential function is obtained to describe angular deviation of the vehicle, and factors, which are found to have an effect on it are analyzed. Research indicates that for each vehicle at a sudden severe braking there is a critical speed at which the vehicle will not yield dangerous deviation even though the rear wheels lock. Above the speed, however, though deviation would happen, there is a time interval in which the swing angle would rise gently it can therefore give the driver an opportunity to adopt some method to avoid the accident.