随着汽车运输事业的不断发展,各种型号的高速汽车也逐渐增多,带来了因本车噪音的干扰,听不到后面发出的超车信号,尤其在白天,驾驶员总不能时时看望倒车镜,不得不使后面的车辆长时间的尾随以侯时机,还有的强行超车。这种现象不仅大大的影响运输时间,还会在 With the continuous development of automobile transportation, various types of high-speed vehicles have also gradually increased, resulting in noisy signals from the vehicles that can not hear the overtaking signal issued later. In particular, during the daytime, the driver can not always see the mirror , Had to make the back of the vehicle for a long time tail Hou, and forced overtaking. This phenomenon not only greatly affect the transport time, but also in