Traffic signals sometimes display arrows to control turns from specific lanes. A green arrow:

Question

A green arrow has the same meaning as a circular green traffic light, but traffic in the indicated lane must turn in the direction shown by the arrow.

Accepted Answer

Has the same meaning as a circular green traffic light, but traffic must turn in the direction indicated by the arrow.

Answer

Is used only on one-way streets.

Answer

Means that you may proceed, but only if the green arrow is accompanied by a circular green light.

Answer

Points the way to an airport.