Maine U-turn laws at controlled intersections and highway crossovers can be confusing, especially if you're used to different rules in other states. The legality often depends on signals, signs, and the type of intersection you're at. As of 2026, Maine follows specific statutes under Title 29-A that clarify when and where you can safely make a U-turn.
Our research into the Maine Revised Statutes and MaineDOT guidelines shows that the rules aren’t one-size-fits-all. Whether you’re at a signalized intersection or a highway crossover, the details matter.
Quick Answer
Maine U-turn laws at controlled intersections and highway crossovers allow U-turns unless signs prohibit them. You can turn at a green light if it’s safe and legal. A red light usually means no U-turns.
Always yield to oncoming traffic and pedestrians. Check for "No U-turn" signs before proceeding.
How Maine defines controlled intersections and highway crossovers
A controlled intersection in Maine has traffic signals, stop signs, or yield signs regulating traffic flow. These are the most common types you’ll encounter in cities like Portland or Bangor.
Highway crossovers refer to breaks in a divided highway’s median, allowing vehicles to cross from one direction to the other. These are often found on routes like I-95 or US-2.
When you can make a U-turn at a controlled intersection in Maine
You can make a U-turn at a controlled intersection if no signs explicitly prohibit it. A green light or green arrow typically permits U-turns unless local ordinances say otherwise.
At a stop sign, you can make a U-turn after coming to a complete stop and yielding to all other traffic. This applies to both two-way and one-way roads, as long as visibility is clear.
When U-turns are illegal at controlled intersections
U-turns are illegal when a "No U-turn" sign is posted. These signs are often placed at intersections with high traffic volume or limited visibility.
You cannot make a U-turn at a red light unless a specific sign allows it. Maine treats this as a violation of right-of-way rules.
You also cannot make a U-turn if it interferes with other vehicles or pedestrians. This includes blocking crosswalks or forcing other drivers to swerve.
U-turn rules at Maine highway crossovers and divided roads
Highway crossovers in Maine are designed for specific movements, and U-turns are often restricted. These areas are marked with signs or pavement markings indicating permitted maneuvers.
At divided highways, U-turns are generally allowed only at designated crossover points. Attempting a U-turn outside these areas can be dangerous and is usually illegal.
The role of traffic signals and signs in U-turn legality
Green lights generally permit U-turns unless a sign says otherwise. A solid green means you can turn if the path is clear and no restrictions apply.
Flashing yellow signals require caution. You can make a U-turn but must yield to all oncoming traffic and pedestrians first.
Red lights are the strictest. U-turns at red lights are illegal in Maine unless a specific sign allows it.
Right-of-way rules you must follow during a U-turn
You must yield to all oncoming traffic when making a U-turn. This includes vehicles going straight in either direction.
Pedestrians in crosswalks have the right of way. Always stop and wait for them to clear the intersection before completing your turn.
If another vehicle is already turning left, they have priority. Wait your turn to avoid collisions.
Common mistakes drivers make with U-turns in Maine
Many drivers assume a green light always means a U-turn is allowed. This isn’t true if a "No U-turn" sign is posted.
Another frequent error is not checking for pedestrians. Failing to yield can result in accidents and traffic violations.
Some drivers misjudge the space needed for a U-turn. Attempting one in a tight intersection can block traffic or cause a crash.
Penalties for illegal U-turns in Maine
An illegal U-turn can result in a fine. The exact amount varies by jurisdiction but typically ranges from $50 to $150.
You may also receive points on your driving record. Accumulating too many points can lead to higher insurance premiums or license suspension.
In some cases, an illegal U-turn can be considered reckless driving. This is a more serious offense with steeper penalties.
Special cases: Emergency vehicles, school zones, and construction areas
Emergency vehicles are often exempt from standard U-turn rules. They can make turns that would be illegal for regular drivers when responding to calls.
School zones have stricter rules. U-turns are usually prohibited during school hours to protect children and reduce congestion.
Construction zones may have temporary signage. Always follow posted instructions, as standard rules might not apply.
Maine U-turn laws vs. other New England states
Maine’s rules are stricter than Massachusetts, where U-turns at red lights are sometimes allowed. In Maine, you must wait for green unless a sign permits it.
New Hampshire has similar restrictions but allows U-turns at some stop signs where Maine does not. Always check local signage when crossing state lines.
Connecticut and Rhode Island both prohibit U-turns at red lights, aligning more closely with Maine’s approach.
Step-by-step: How to safely execute a legal U-turn in Maine
First, check for "No U-turn" signs. If none are present, proceed only when the signal allows it.
Signal your intent early. This gives other drivers time to react and keeps traffic flowing smoothly.
Yield to all oncoming traffic and pedestrians. Complete your turn only when the path is completely clear.
FAQs about Maine U-turn laws at intersections and crossovers
Is a U-turn legal at a red light in Maine?
No, U-turns at red lights are illegal in Maine unless a specific sign allows it. This rule prevents confusion and maintains intersection safety.
Can I make a U-turn at a stop sign in Maine?
Yes, but only after coming to a complete stop and yielding to all other traffic. Check for pedestrians and oncoming vehicles first.
Are U-turns allowed at highway crossovers in Maine?
Only at designated crossover points. Attempting a U-turn elsewhere on a divided highway is illegal and dangerous.
What’s the fine for an illegal U-turn in Maine?
Fines typically range from $50 to $150. You may also receive points on your driving record.
Do emergency vehicles follow the same U-turn rules?
No, emergency vehicles are often exempt when responding to calls. Regular drivers must still follow all posted signs and signals.
Final decision guide: Can you make that U-turn?
If you see a green light and no "No U-turn" sign, you can proceed. Always yield to traffic and pedestrians first.
At a red light or stop sign, assume U-turns are illegal unless a sign explicitly permits them. When in doubt, don’t turn.
On divided highways, only use designated crossovers. Never attempt a U-turn in an undignated area.
