U-Turn Rules: When U-Turns Are Legal and How to Make One Safely

Where U-turns are generally legal

In many states, U-turns are allowed wherever they are not specifically prohibited by a sign or law, as long as you can complete the turn safely and have a clear view of traffic in both directions. Intersections with a green light or a dedicated U-turn signal are common legal spots, and some left-turn lanes permit a U-turn unless a sign says otherwise.

The key conditions are visibility and safety. Even where a U-turn is technically legal, you may only make one if you can see far enough in both directions to complete it without interfering with traffic. If a hill, curve, or obstruction blocks your view, a U-turn is not safe and should not be attempted.

Where U-turns are prohibited

U-turns are banned in a number of predictable places, whether or not a sign is posted. These typically include locations where your view is limited, such as near the crest of a hill or on a curve, and places where the maneuver is inherently hazardous. A posted No U-Turn sign, a circular arrow with a slash through it, makes it illegal regardless of conditions.

Common prohibited locations include in front of a fire station, at railroad crossings, on many one-way streets, where signs forbid it, and in business and residential districts in some states except at intersections. When you are unsure, the safest assumption is that a U-turn is not allowed and to find a legal alternative like going around the block.

• Anywhere a No U-Turn sign is posted
• Near the top of a hill or on a curve where your view is blocked
• At or near railroad crossings
• In front of a fire station
• Where signs, signals, or local law prohibit it

How to read U-turn signs and signals

The standard No U-Turn sign shows a curved arrow doubling back with a red circle and slash over it, meaning U-turns are not permitted at that location. Some intersections combine signs, such as a No U-Turn paired with a No Left Turn, so read the full set before you act.

Some busy intersections have a dedicated U-turn arrow signal that tells you exactly when a protected U-turn is allowed. Others post signs that permit a U-turn only on a green arrow. Where a sign specifically allows U-turns, follow its timing. Where nothing is posted, fall back on your state's default rule and on whether the turn can be made safely.

How to make a safe U-turn step by step

When you have confirmed a U-turn is legal and safe, approach in the leftmost lane or the dedicated turn lane and signal your intention well in advance. Come to a stop if needed and check traffic in every direction, including oncoming vehicles, cross traffic, and pedestrians in the crosswalks you will cross.

Yield to all traffic and pedestrians that have the right of way, because a U-turning driver must yield to oncoming and crossing traffic. When there is a clear gap large enough to complete the full 180 degrees without stopping in a travel lane, steer smoothly through the turn into the correct lane on the opposite side, then straighten out and resume normal speed.

Common U-turn mistakes to avoid

The mistakes drivers make with U-turns are usually about judgment, not steering. Attempting one where the view is blocked, misjudging the gap and forcing oncoming traffic to brake, and failing to yield to pedestrians are the big ones. Making a U-turn from the wrong lane, such as a middle lane instead of the far left, is both unsafe and a test failure.

On the road test, examiners watch for whether you choose a legal, safe location, signal, check thoroughly, and complete the turn without a multi-point shuffle or interfering with traffic. If the road is too narrow to complete a U-turn in one smooth motion, a three-point turn is the correct maneuver instead. When in doubt about legality, skip the U-turn and take a safe alternate route.