Patent ID: 7936282
Filing Date: 2011-05-03
Classification: G07B,G08G

Abstract:
1. A system for controlling vehicles, for at least one of security purposes, law enforcement and fleet management, comprising: a car unit (CU) permanently mounted in each of said vehicles, for transmitting a vehicle identifying signal; a portable personal unit (PU) carried by a driver, comprising a memory device in which is stored driver identifying data (ID), and a transceiver for periodically transmitting said ID to said CU without any driver initiated operations so that said vehicle identifying signal will also include said ID, transmissions of said PU transceiver having a range sufficient for being received by said CU as long as the driver is in the vehicle, but too short to be received by said CU if the driver leaves the vehicle; and a road unit (RU), comprising a transmitting beacon for continually transmitting a beacon signal, a RU processor for receiving said beacon signal, and a vehicle indicator for indicating passage of a vehicle between said beacon and said processor, wherein said RU processor is operable to receive said vehicle identifying signal when said beacon signal is temporarily blocked by a passing vehicle and to process said vehicle identifying signal, whereby to single out suspect vehicles.