Introduction - If you have any usage issues, please Google them yourself
(1) with two sets of red, yellow, and green lights as the two directions of red, yellow, green (2) with two sets of digital control things and north-south direction as a countdown to show time for the red light 45 seconds 50 seconds green, yellow 5 seconds (3) the actual traffic light in accordance with the rules, so that red, yellow, green and