🎓 Prepared by students from Boğaziçi University

What Are U-Turn Regulations?

U-turn regulations define where drivers can legally reverse direction. They prevent head-on collisions and ensure safe traffic flow at intersections.

Short answer

U-turns are prohibited on motorways, expressways, at unmarked intersections, on blind curves, in tunnels, and where 'no U-turn' signs are posted. They're allowed only at marked U-turn areas and when traffic signals permit.

U-Turn: Allowed vs Prohibited
Allowed Zones
  • Marked U-turn area or lane
  • Intersection with traffic light allowing it
  • Wide, well-lit street (good visibility)
  • City roads under speed limit
Prohibited Zones
  • Motorways / expressways
  • Blind curves (poor visibility)
  • Tunnels and underpasses
  • Unmarked intersections
  • Within 100 m of school zone
01

Step-by-step worked examples

A driver is at a marked U-turn lane at a green signal. Can they turn around?

Location: marked U-turn area
Signal: green (permitting U-turn)
Condition: visibility is clear
Result: U-TURN ALLOWED

On a curved mountain road with 'No U-Turn' sign visible. Is this allowed?

Road type: mountain curve (blind curve)
Sign: 'No U-Turn' posted
Hazard: poor visibility for oncoming traffic
Result: U-TURN PROHIBITED — risk of head-on collision

Highway entrance ramp — can a driver U-turn back to the entrance?

Location: highway / motorway entrance
Rule: U-turns strictly prohibited on motorways
Reason: high-speed traffic, no median gap
Result: PROHIBITED — illegal and extremely dangerous
02

Flashcards

03

Quick quiz

Q1.U-turns are prohibited on which road type?

Correct answer: B. Motorways are high-speed, median-divided roads. U-turns cause catastrophic head-on collisions.

Q2.You see a 'No U-Turn' sign. What do you do?

Correct answer: C. 'No U-Turn' is absolute. Turning is illegal and dangerous. Find a legal turning point or alternate route.

Q3.Blind curve with no markings. U-turn legal?

Correct answer: B. Blind curves hide oncoming traffic. U-turns are implicitly dangerous and prohibited.

Q4.Marked U-turn lane, red signal. Can you turn?

Correct answer: C. Traffic signals govern all turning. Red means stop — wait for green or a green arrow.
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04

Common mistakes

If the road is empty, a U-turn is safe.Correct: Road emptiness doesn't override the law or safety. Prohibited zones stay prohibited.

A 'No U-Turn' sign only applies during rush hour.Correct: Signs are always in effect unless posted otherwise (e.g., 'No U-Turn 7-9 AM').

U-turns are allowed on any city street.Correct: City streets still have regulations. Check for markings and signs at each intersection.

Emergency vehicles can ignore U-turn prohibitions, so I can follow them.Correct: Emergency vehicles have different rules. Regular drivers must obey prohibitions always.

05

FAQ

What are U-turn regulations and why?

U-turn rules prohibit reversing direction on motorways, curves, and unmarked intersections to prevent head-on collisions and chaotic traffic flow.

Where are U-turns allowed?

Only at marked U-turn zones (painted lane or sign), when traffic lights permit (green or green arrow), and where visibility is excellent.

What is the penalty for an illegal U-turn?

Fines range from €50–200+ depending on the jurisdiction and whether an accident occurred. Points on license also apply.

Can you U-turn on a blind curve?

No — visibility is poor, oncoming traffic is hidden, and collision risk is extreme. Find a legal turning point.

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