Introduction - If you have any usage issues, please Google them yourself
This intersection traffic light control system, and North-South Road West and East Road, located north-south road for the A Road, East Road to B Road. Requirements: First, what intersection red light, green light intersection north and south, and 25s countdown began with a 7-segment display time. 5s 25s countdown after the end of the countdown, the green light flashes north-south junction, to the last time 2s, the north-south crossing yellow light. Completion of this cycle requires 1 30s. After the 30s, north-south crossing the red light, green light thing intersection, and re-30s countdown, followed by cycle. If required by emergency vehicles, this system should be able to prohibit ordinary vehicles, and to allow emergency vehicles.