| 摘要 |
A system is disclosed for monitoring speed of highway vehicles from a central control station. The system includes posting devices positioned at intervals along the highway and adapted to receive a speed message from the control station and transmit the speed message to passing vehicles in a limited region of the highway in the form of an r-f signal. Each vehicle contains an r-f receiver which is connected to the vehicle speedometer or other vehicle indication means in a manner that will provide, upon the occurrence of some predetermined excessive speed, an indication to the driver of the vehicle that the speed limit at that particular region of the highway is being exceeded. There is provision, also, for means for reporting back to the control station the occurrence of excessive vehicular speed as well as for providing accident warnings and the like.
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