Traffic light countdown timer brief description!

First, the full program traffic countdown timer (learning type): The full program traffic countdown timer (learning type) is mainly used for fixed time multi-time, multi-program traffic light control intersection, showing 2 countdown time, the longest display time is 99 seconds, Simultaneously display all green, yellow or red light times.

1. According to the “Road Traffic Signal Countdown Monitor GA/T508-2004”, when the traffic light control scheme is switched, the countdown will run in the black screen state during the two traffic lights. This is normal and the equipment is not faulty.

2. When some red/green time exceeds 99 seconds (the longest display time), the countdown timer will stop at 99 seconds until the long time is over.

Second, the post-program traffic countdown timer: The post-program traffic countdown timer is a countdown timer used with the intelligent traffic signal control system (SCATS system), which starts to display the red/green time at the end of each red/green time. The post-program traffic countdown timer starts to display only at the last time of the red/green time, so it is blacked out most of the time.

Third, traffic countdown classification: traffic countdown: unit starts from 9, double position starts from 99, two and a half also calls three from 199; color can be divided into: monochrome, two-color, three-color; countdown combination: countdown plus Arrow lights, countdown plus disc lights, countdown plus pedestrian lights.