Theory Mastery

Sign C17: Closed to vehicles and combinations of vehicles which

C17 – Closed to vehicles and combinations of vehicles which

Series: C -- Closed to traffic

Legal meaning

Closed to vehicles and combinations of vehicles which, including their load, are longer than indicated on the sign.

Source: RVV 1990 annex 1 · checked 2026-10-23

Shape and colour

Round white sign with a red rim and a black vehicle with a length (for example 10 m): closed to vehicles longer than that.

Where the sign stands

At the start of the closed stretch, right after the junction, on the right; often before a sharp bend or a narrow bridge.

What the exam asks about this sign

The exam gives a number on the sign and a vehicle length in the question: if the combination is longer than the number, you may not enter. The length covers the whole vehicle including trailer and load. Trap: candidates leave out the trailer or confuse length with width (C18) or height (C19).

Exam question on this sign

About Closure signs C: who, what and which number is barred: which statement is WRONG?

  1. C17 = length; C22 = closed to vehicles carrying certain dangerous goods, not a dimension.
  2. The sign looks at the total mass or the sum of the axle loads — the actual, measured mass — not the permitted maximum mass on paper.
  3. A closure never applies to cyclists; they may always continue regardless of which sign is present.
  4. C6 = closed to motor vehicles WITH MORE THAN TWO WHEELS; this excludes a motorcycle (two wheels) from the ban, but an ordinary car falls under it.
Show the answer

Correct answer: A closure never applies to cyclists; they may always continue regardless of which sign is present.

Cyclists are only exempt if an under-sign with 'uitgezonderd' plus the cycle symbol explicitly says so; without that under-sign the ban applies to them too

Why learners get this wrong: Sign C22 closes the road to vehicles that, including load, are longer than the indicated figure — just like C17.

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Often confused with

Signs in the same series

Where this is explained

Topics that use this sign

Questions using this

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