vehicle activated signs造句

例句與造句

1. Speed limit enforcement techniques include : direct police action, automated systems such as speed cameras or vehicle activated signs or traffic lights triggered by traffic exceeding a preset speed threshold.
2. Following the decision by Portsmouth City Council to remove all their speed cameras, a councillor stated that the evidence is that vehicle activated signs are at least as effective at reducing traffic speeds as speed cameras and at one-tenth of the cost.
3. The devices have been referred to by a wide variety of names, a partial list of which follows : driver feedback sign, radar signs, Vehicle Activated Sign ( UK ), changeable message sign, Your Speed sign, radar feedback sign, speed radar sign, radar speed display, speed feedback sign, traffic calming sign, speed display board, dynamic speed display ( DSDS ) or variable message sign.
4. It's difficult to find vehicle activated signs in a sentence. 用vehicle activated signs造句挺難的