it helped other people by allowing them to stop and letting cars pass
traffic barricade big rock the brakes perhaps?
You can infer what traffic lights other people have based on the behavior of their vehicles. For example, if you see a line of cars slowing down and coming to a stop while approaching an intersection, it is likely that the traffic light for that direction is red. Conversely, if you see cars accelerating as they approach an intersection, it is likely that the traffic light for that direction is green.
Stop.
use lights on cars
Stop lights, also known as traffic lights or traffic signals, were first installed in London, England. The first traffic signal was installed in 1868 to to help control traffic.
traffic lights can hurt animals such as deer.Deer freeze or run in front of cars when hey see lights. Imagine now a deer and LOTS of lights
Reflections in the car behind when you stop at traffic lights.
Often, because there are a lot of traffic lights around...
If the traffic lights are not working, the intersection is treated like a 4-way stop. That is, as if everyone has a stop sign.
stop at the stop line
DONT LOOK IM CHANGING! like the joke?