A red light with a green arrow means you may proceed only in the direction the arrow points. The red light still stops every other movement at the intersection. The arrow carves out one authorized path through an otherwise red signal, and that path is protected: conflicting traffic has been held so you can complete the turn without weaving through gaps.
What Each Part of the Signal Is Doing
The solid red circle and the green arrow control different movements at the same instant. The red does its ordinary job and tells traffic to stop. The green arrow permits movement in the arrow’s direction only. Federal signal standards require that a steady green arrow display only after conflicting traffic and pedestrians have been stopped, so the path the arrow indicates should be clear of opposing vehicles.1Federal Highway Administration. MUTCD 11th Edition – Part 4
Traffic engineers call this a protected turn. You are shielded from conflict, not merely allowed to go. The arrow is a dedicated phase built into the signal’s timing specifically so turning drivers can clear the intersection without judging oncoming gaps.
How To Proceed
Enter the intersection and complete only the movement the arrow shows. A left arrow means left. A right arrow means right. Going straight, turning the opposite direction, or making any other movement violates the red light. The MUTCD states that traffic facing a green arrow “is permitted to cautiously enter the intersection only to make the movement indicated by such arrow, or such other movement as is permitted by other signal indications displayed at the same time.”1Federal Highway Administration. MUTCD 11th Edition – Part 4
That final clause matters at intersections that display more than one green indication at once. Each simultaneous indication authorizes its own movement. When the only green is a single arrow, that arrow is your sole permission to move.
Can You Still Turn Right on Red?
This is where drivers most often get caught out. If you are facing a solid red circle with a green left arrow and you want to turn right, the normal right-on-red rule still applies in most states. A solid red circle generally permits a right turn after a complete stop, provided no sign prohibits it and you yield to pedestrians and cross traffic. The green left arrow controls the left-turning phase; the red circle still governs everyone else under the usual rules.
The answer changes if the red indication is a red arrow rather than a red circle. A steady red arrow specifically prohibits movement in the arrow’s direction, and many states do not allow any turn against a red arrow. The shape of the red is the detail to check before you move.
When the Green Arrow Ends
The arrow does not stay lit indefinitely. In most cases it changes to a yellow arrow before going dark. A steady yellow arrow means the protected phase is ending and you should prepare to stop. If you have already entered the intersection, finish the turn. If you have not entered yet, stop.
Once the arrow goes dark and only the red remains, you no longer have permission to make that turn and must wait for the next signal change. Some intersections cycle to a green circle, which allows all movements but no longer protects left turns from oncoming traffic. Others display a flashing yellow arrow, which permits an unprotected turn only after you find a safe gap. Watch which indication replaces the green arrow, because the rules shift with each one.
Yielding Still Applies
A protected turn is not an unobstructed one. Federal standards require drivers on a green arrow to yield to pedestrians lawfully in the crosswalk and to any vehicles already in the intersection.1Federal Highway Administration. MUTCD 11th Edition – Part 4 Someone who entered on the previous phase, or a pedestrian who started crossing late, still has the right of way.
Emergency vehicles override everything. If an ambulance or fire truck approaches with lights and sirens while you have a green arrow, do not enter the intersection. If you are already inside it, clear it safely, then pull right and stop.
U-Turns on a Green Left Arrow
Whether a green left arrow authorizes a U-turn varies by state. Some states treat the arrow as permission for any leftward movement, including a U-turn. Others require a specific signal or sign permitting U-turns. The MUTCD treats U-turns as a special situation within its green arrow provisions, recognizing that a U-turn from a left-turn lane can conflict with traffic the signal was not designed to protect.1Federal Highway Administration. MUTCD 11th Edition – Part 4 Unless you know your state allows it, treat a green left arrow as permission to turn left only.
Penalties for Moving Against the Red
Going straight or turning the wrong way while the green arrow points elsewhere is a red light violation, treated like running any other red signal. Fines vary widely, from as little as $20 in some jurisdictions to over $500 in others once surcharges and court costs are added. Most states classify a red light violation as a moving infraction that adds points to your driving record and can raise your insurance premiums for several years.
Red light camera tickets, where they exist, often carry lower fines and no license points unless you ignore them. An unpaid camera ticket typically escalates to a standard citation with the full fine and points. The underlying violation is the same whether a camera or an officer caught it: you moved against a red signal without the authorization of a green arrow or a lawful right-on-red turn.