Research on Amount and Position of Road Side Traffic Signs

For intercity and urban expressways there are lanes usually divided for different vehicles,with offside lane for cars and nearside lane for trucks.This may made the drivers of the cars can't see road side traffic signs,which may cause traffic accidents.On the base of analyzing the recognizing process of road side traffic signs,the method to calculate the probability of the individual road side traffic sign being blocked off is put forward.The mathematical models of road side traffic signs' setting amount and position are proposed,including the traffic sign development program.The demonstration results show that those models and theory are feasible.