What does it mean to be reminded by voice that "there are illegal photos ahead" on the expressway? What should I pay attention to when I receive this voice message?

"There are illegal photos in front" means that there is a camera in front, and offenders will take photos.

So pay attention to the following points:

Pay attention to the speed, distance and whether the seat belt is fastened.

Pay attention to the emergency lane or overtaking lane according to the regulations, and don't turn, reverse or turn around, or turn around and cross the central divider.

Be careful not to let people drive without a driver's license or drunk.

Illegal photo taking:

The electronic eye senses the pressure from the car on the road surface by the induction line, and the signal is collected by the sensor to the central processor and sent to the register for temporary storage (the data is valid during the red light period).

Working principle:

1, the electronic eye senses the pressure from the car on the road surface by the induction line, and the signal is collected by the sensor to the central processor and sent to the register for temporary storage (the data is valid during the red light period);

2. In the same time interval (red light period), if two pulse signals are generated at the same time, it is regarded as "effective". Simply put, if it was a red light, your front wheel crossed the line and your rear wheel didn't press the line, only one pulse was generated. When there are no two consecutive pulses, no pictures are taken;

3. Sometimes someone crosses the line with the front wheel and is afraid of being photographed, so he backs off and goes back to the line, and the result is still photographed. What is the reason? It is precisely because of the series connection that a pair of pulse signals are generated (the pair of pulses are generated in the same red light period);

4. When the yellow light is on, the camera system starts after a delay of 2s; When the red light is on, the system has started; When the green light is about to light up, turn off the system 2s in advance, mainly to prevent the wrong shooting. So many taxi drivers know that they can leave almost, which is the reason. But I advise you not to do so, because the timing is difficult to grasp.