the sensors can track you're car. The sensor can see if you ran a red light
It is usually on the bottom of the traffic light.
that's not a camera but it's a sensor. for example that if its dark then it will on the keypad light.
the red light. it means STOP.
The red light on a traffic light is typically located at the top. The sequence of lights from top to bottom is red, yellow, green.
bottom
The lowest light on a traffic signal is green. Some cities use traffic lights that are not arranges top to bottom but rather side to side. In this event the green light is usually the furthest to the right.
Red is the top position on a traffic light. It signifies that vehicles must stop.
go outside and look
The green light on the traffic light is on the bottom. The yellow is in middle, the red is on top. However, in some municipalities, the traffic lights are not vertical, they are horizontal. In these instances, the green light is usually, but not always, the furthest to the right.
In North America, it's on the bottom.
The colors of a traffic light are arranged from top to bottom in the following order: red, yellow (or amber), and green.