| 摘要 |
<p>Traffic control system for signalling timely any obstruction on the road determined by accidents, ja ns etc., in order to signal the presence of still motor-vehicles to the vehicles being arriving. Control system comprising a plurality of autonomous detecting units (10), co-operating with analogous units distributed along the road, and each comprising a control plant (11) formed by sensor means (13,14) of the presence of motor-vehicles, a timer unit (15) receiving the signals provided by the sensor means when the vehicles are passing and letting only a signal longer than a pre-established time to pass, in the case in which a vehicle column has been formed, and a central control unit (16) receiving the signals from the sensor means (13,14) and the timer unit (15) and adapted to control alarm means (17,18) when the column is formed and radio-transmitter units (19,20) and radio-receiver units (21,22) The system is housed inside an envelope (27) shaped preferably like a kerbstone ¸& <IMAGE></p> |
