| 摘要 |
A signalling device comprising a housing, a reflective coating to the housin g, at least one light provided in the housing, battery and charging circuitry a nd a switch for switching the light(s) on and off. It can be provided either on a pole f or 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 t he 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 camer a is activated with by speed in excess of a speed limit or by an operator.</SDOAB >
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