A fan warning model for curved roads was proposed based on millimeter wave radar.The method named virtual road simplification of the model was introduced.The related parameters of the model such as the actual following distance,the critical following distance,the velocity,and the acceleration were determined.The concept of driving safety margin,which is the ratio of the actual following distance and the critical following distance was introduced.A graded early warning mechanism was established based on driving safety margin. The simulation results showed that the fan warning model for curved roads could effectively reduce false alarms and leak alarms,and the model was feasible.
