The invention relates to a method for detecting the passage by a vehicle of a determined point for monitoring on a road, wherein from a remotely situated location a
radar beam is transmitted continuously to the point for monitoring, reflections from the transmitted
radar beam are received at the remotely situated location, and it is determined from the received reflections that the vehicle is passing the point for monitoring. The
radar beam can herein be transmitted at an
acute angle to the travel direction of the passing vehicle. The detection can be used to activate a red-light camera, to measure the speed of the vehicle or measure the
traffic intensity, without sensors, for instance induction loops, having to be arranged in the road for this purpose.