Near Roosendaal you see sign C22 at a viaduct, without a number on it. What does this sign prohibit?

Vehicles carrying certain dangerous goods, regardless of their size

Vehicles that, including load, are longer than a certain figure

Explanation

Wrong — trap: last code in the sequence wrongly generalised. **C22 = dangerous goods, no number. C17 is the length restriction.** Book p.239-240.