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What does the roundabout (mandatory direction) sign mean in Turkey?

Last updated: 28 October 2026 · Sign code: TT-37 · Mandatory signs

Roundabout (mandatory) road sign (Turkey)
Roundabout (mandatory) (TT-37)

In short: This sign means you are entering a roundabout and must go round the central island in the direction of the arrows. It is a blue circle with three white arrows arranged in a circle.

What should you do when you see this sign?

  • When entering, give way to vehicles already going round.
  • Go round the island in the direction of the arrows (anticlockwise in Turkey).
  • Signal right and leave carefully at your exit.

Where and why is it used?

This is a mandatory sign and is usually used together with a give way sign at the roundabout entrance. At roundabouts, vehicles already inside have priority.

Blue circle Show what you must do. A red circle says "don't", a blue circle says "do this".

Which sign is it confused with?

Roundabout ahead road sign
Roundabout aheadT-24The roundabout ahead sign is a red-bordered triangle that warns you in advance; this blue sign is at the entrance and tells you the direction.
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Mandatory signs: other signs

To see every sign with pictures on one page, go to the Turkish road signs guide. For the other traffic topics, try the traffic questions.

This is a simplified drawing for learning; the official sign's dimensions and details may differ.

Sources (Turkish): Highway Traffic Law No. 2918 · Highway Traffic Regulation · KGM road signs handbook, vertical signs

Türkçe: Ada etrafında dönünüz işareti