A new approach to speed camerasAverage speed radars, already a common presence on Spanish roads, are now gradually appearing on Portuguese roads and motorways. About a year ago, the National Road Safety Authority (ANSR) announced the obtaining of 10 of these radars, which will be implemented in 20 possible locations.
Unlike conventional radars that measure instantaneous speed, these average speed radars will be identified by specific signs, namely traffic sign H42. Unlike traditional radars, these systems do not emit radio or laser signals, making them undetectable by radar detection devices.
More a stopwatch than a radarDespite the name "radars", these systems operate more like stopwatches equipped with cameras, measuring average speed indirectly. In areas with average speed cameras, one or more cameras capture vehicle registration numbers at the beginning of a segment, recording the precise time of passage.
At the end of the segment, more cameras identify the license plate again and record the departure time. Subsequently, a computer processes the data and calculates whether the vehicle covered the distance between the cameras in less time than the minimum necessary to comply with the speed limit in that area. If this occurs, the driver is considered to have exceeded the permitted speed.
For a better understanding, an example: in a monitored segment of 4 km with a maximum limit of 90 km/h, the minimum time to cover the distance is 160 seconds (2 minutes and 40 seconds), which is equivalent to a precise average speed of 90 km/h between the two control points. If a vehicle covers this distance in less than 160 seconds between points, this will indicate that the average speed was greater than 90 km/h, exceeding the speed limit. It is important to note that average speed cameras do not have a margin of error, as they measure the time between two points (from which the average speed is calculated), therefore, any excess is punishable.
Can't fool themDue to their method of operation, average speed cameras are typically difficult to avoid. They are often installed on sections without junctions or exits, forcing all drivers to pass through both control points. Trying to stop to save time is, in fact, counterproductive: if you are already traveling at excessive speed and stop to avoid the radar, the time advantage gained is nullified. Furthermore, these speed cameras are located in segments where stopping is prohibited or extremely difficult.
The new Radar locationsThe 10 average speed radars initially announced by ANSR will soon be put into operation in 20 possible locations.
After a period of testing that began a few months ago, ANSR confirmed that these radars will come into operation during the summer. When activated, they will be clearly identified by the new H42 traffic sign.
Where will these radars be?Average speed cameras will be located in the following locations:
- Beja: IC1;
- Coimbra: A1 e EN109;
- Évora: A6 e IP2;
- Lisboa: A9, EN10, EN6-7 e IC19;
- Porto: A3;
- Santarém: A1;
- Setúbal: EN10, EN378, EN4 e IC1.