What does a green arrow above a lane signal in a large city?

The presence of a green arrow above a lane indicates that drivers are permitted to drive in that specific lane. This signal serves as a clear instruction to indicate that it is safe to proceed, often found at intersections or in designated lanes where the flow of traffic is controlled.

Using a green arrow signifies to motorists that they should continue moving forward, contrasting with other signals such as red lights or yellow signals, which may indicate the need to stop or proceed with caution. Understanding this signal is critical for safe driving behavior, as it helps maintain orderly traffic flow and enhances safety at busy intersections or during lane changes in urban environments.

Though there are various signs and signals that communicate different information about lane usage, the green arrow is unequivocal regarding permission to proceed in that lane.