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

Question

A solid red arrow in a traffic signal means the same thing as a circular red traffic light. When an arrow is red, traffic in the indicated lane must stop and may not turn in the direction that the arrow is pointing.

Accepted Answer

Has the same meaning as a circular red traffic light.

Answer

Is never used as a traffic signal.

Answer

Means that drivers may turn in the direction indicated by the arrow.

Answer

Means that the traffic the arrow is pointing toward must stop.