it means you may go straight ahead or turn except where signs prohibit turns and traffic and pedestrians alright in the intersection must get out of your way.
On a vertical display traffic signal the green light is on the bottom. On a horizontal display traffic signal it is to the right, but may depend on that state (or municipality's) practice.
A traffic signal displaying a steady circular yellow light means that you should use caution when going through the intersection. You have the right away, but watch for other cars.
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.
Green-Yellow-Red-Green For color blind people the traffic light would be upright and from top it would be. Red Yellow Green.
A traffic signal displaying a steady circular green light means that, at least according to the light, you have the right to proceed. BUT, that also means "only if it is safe to do so". For example, a driver coming South is in the intersection, going straight, when the light changes. Traffic stops him from getting out of the intersection. You are traveling west and want to turn South. But his Range Rover is in the intersection! You have the green light! What you do is stay put, even if your light changes to red before you can move into your turn, even if everyone behind you gets mad at you. You must not clog up the intersection, because drivers coming East may want to turn North.
A light signal
It means that oncoming traffic is stopped by a red light.
It's a traffic signal. Or to my belief it is the Mobile spy
Emergency vehicles carry a transponder that transmits a radio signal to change the traffic lights to green for them.
A signal light that is not working.
Stop light is another name for a traffic signal.
is just a symbol to show you when to go on and when to stop. usually the sequence of traffic signal light is red--NO cross; Yellow --warning; Green --cross. The three colors appear in turns.