| 摘要 |
A distance warning installation for vehicles, especially for motor vehicles, in which each vehicle is equipped with one or two transmitters, radiating beams of light or other waves toward the rear, as well as with a forwardly directed receiver mounted at the vehicle front end for receiving the same types of waves; when the waves of the directional beam transmitted by the preceding vehicle are received by the receiver of the following vehicle, an acoustic and/or optical signal is produced by the receiver and/or a braking operation is automatically initiated thereby. |
