The answer is They don’t work and will cause harm in the long run
B. Lactic Acid is correct
If i understood your question right, the cars going straight have to keep going until the red light. but people going either left or right, have to slow down for the other people on the other side of the intersection to cross going either left or right.
You will die and you could get lung cancer and yeah DO NOT SMOKE DAILY
it is bad real bad.
I hope this helps I tried my best.
