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You don't have to wait any amount of time when the light turns green, when the light turns green that means the intersection is safe for you to proceed.
Only if there is no opposing traffic to wait for, you can not turn in front of traffic.
A car speeds up as a traffic light turns green.
It means that either turns can be made in the direction shown by the green light or that a stop must be made before turning in the direction shown. Either way, turns are permitted.
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.
stop but if 5m from walking line charge forword
Okay, you're talking about the delay when the light turns red for one direction and then turns green for another direction. My guess would be that it would be to ensure that the intersection is clear before another direction of travel is given the green.
When the traffic light comes into view and it's green, it was likely green for a long time, unless you also observe cars just starting to get going. If you see the traffic light is green in the distance we call this green light "stale", meaning it could turn yellow any second. A traffic light that just turned green, we call this green light "fresh", meaning it just turned green and it won't be turning yellow for a little while. Of course these times between from when it turns green then back to yellow and red again varies on the intersection. To answer the question when you're approaching a green traffic light you should prepare to stop as that green light is "stale". You don't necessarily have to slow down just get ready to hit the brake.
A green light on a traffic light set (in the UK) means automobile traffic is free to go. Walking out when commuter traffic lights are on green is a bad idea. Answer from @MunicipalSigns: In general: A steady GREEN traffic light means you can go through the intersection. You must yield to emergency vehicles and others as required by law. If you are stopped and then the light turns green, you must allow crossing traffic to clear the intersection before you go ahead. A GREEN arrow means you can safely turn in the direction of the arrow. There should be no on-coming or crossing traffic while the arrow is green. If you are turning left, a steady green traffic green light means you may turn but only when safe to do so. Oncoming traffic has the right-of-way. Be alert for signs that prohibit left turns. When turning right or left, watch for pedestrians crossing in front of your vehicle.
Turn only after there is no danger from oncoming vehicles
If you are referring to a green arrow pointing upwards at a traffic light then that is pretty much the same thing as a green light signalling for traffic to continue moving forward. Traffic is allowed to move in the direction of the arrow. Commonly used to allow "protected" left turns at an intersection while the red ball prevents traffic from going straight across the intersection.
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.