Traffic lights manufacturer led all how to observe light from a distance, should predict the next cycle signal changes.

1, the green signal lights: can not pass, at any time to prepare to slow down or stop.

2, yellow signal lights: according to the distance from the intersection to, speed, determine is forward or stop.

3, red signal lights, see the red light bright, forecasts into a green light time. To control the speed of the appropriate. Yellow area is difficult to determine it is forward or parking lot, through the intersection should be aware of this region, often based on conditions such as speed to make the right judgment.

This article provided by the traffic signal lamp manufacturer.