🎓 Prepared by students from Boğaziçi University

What are Prohibition Signs?

Prohibition signs forbid specific actions and are among the most restrictive traffic signs. Marked by red circles with slashes or crosses through symbols, these signs indicate actions drivers absolutely cannot perform in the marked area or at the indicated time.

Short answer

Prohibition signs are red circles with a slash through a symbol that forbid actions such as 'no entry,' 'no parking,' or 'no passing.' Violating a prohibition sign incurs a traffic violation or fine.

Prohibition Sign Workflow

1
See the red circle with slash
Identifies a forbidden action in the area.
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2
Read the symbol inside
Understand what action is forbidden: entry, parking, passing, etc.
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3
Do NOT perform the action
Absolutely comply; violations incur penalties.
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4
Accept the restriction
The rule applies to you; no exceptions while sign is posted.

Step-by-step worked examples

You see a red circle with 'P' with a slash through it. What does this prohibition sign mean?

This is a 'no parking' prohibition sign.
It forbids parking in this area, possibly only at certain times (check time restrictions).
Parking here results in a fine or tow.

A red circle with an arrow pointing right and a slash appears at a corner. What action is forbidden?

This is a 'no right turn' prohibition sign.
It forbids turning right at this location.
Turning right here violates the rule and may incur a fine.

You encounter a red circle with a car and slash. What is forbidden?

This is a 'no entry' prohibition sign.
It forbids all vehicles from entering this area.
Entering when posted violates traffic law.

Flashcards

Quick quiz

Q1.What shape and color indicate a prohibition sign?

Correct answer: B. Prohibition signs are red circles with a slash.

Q2.A red circle with 'P' slashed appears. What is forbidden?

Correct answer: B. Red circle with 'P' and slash = no parking.

Q3.What is the difference between a warning and prohibition sign?

Correct answer: B. Warning signs alert to hazards; prohibition signs forbid actions.

Q4.Can a prohibition sign have time restrictions?

Correct answer: B. Many prohibition signs include time restrictions; always check for details.

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Common mistakes

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Ignoring a prohibition sign because it seems enforced lightly. — Correct: Prohibition signs always apply; ignore them and face fines.

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Assuming 'no parking' applies only at rush hour. — Correct: Check time restrictions; some apply 24/7, some specific hours.

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Confusing prohibition (red slash) with mandatory (blue circle). — Correct: Red with slash forbids; blue circle commands.

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Parking in a 'no parking' zone briefly thinking no one is watching. — Correct: Violations are recorded; fines apply regardless of enforcement visibility.

FAQ

What are prohibition signs?

Prohibition signs are red circles with a slash forbidding specific actions like entry, parking, or passing.

How do you identify a prohibition sign?

Red circle with a slash through a symbol inside. The symbol indicates the forbidden action.

What happens if you violate a prohibition sign?

You incur a traffic violation, fine, and possible points on your license depending on jurisdiction.

Do prohibition signs always apply all day?

No; many include time restrictions like 'no parking 8am-6pm.' Always read the posted times.