| 摘要 |
A signalling device comprising a housing, a reflective coating to the housing, at least one light provided in the housing, battery and charging circuitry and a switch for switching the light(s) on and off. It can be provided either on a pole for use by a patrol office or attached to a fixed post or wall. The light(s) will be LEDs. Two lights are provided with circuitry to allow alternate flashing of the lights. In an alternative, lights in the shape of arrows or other shapes may be provided. The device also includes a sounder controlled either by the same switch as the lights or independently. In addition, the device further includes a digital camera and means for determining the speed of on-coming or departing traffic. The camera is activated with by speed in excess of a speed limit or by an operator.
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