| 摘要 |
A photographic traffic monitoring device comprises a sensor responding to passing vehicles, for example, an induction loop imbedded in the road for monitoring traffic lights or a Doppler radar. From a signal evaluation it is determined whether a detected vehicle has violated a traffic regulation, e.g. exceeded the allowed maximum speed limit. When such a violation takes place, a camera is automatically released and the monitored vehicle is photographed. In order to collect data for statistical purposes about traffic events obtained with such devices, a memory function is provided. This function records events detected by the device, events which are not restricted to violations of traffic regulations.
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