About Direction of travel and overtaking bans: D-signs and F-signs: which statement is WRONG?
- The duty is following ONE OF the directions shown on the sign — both displayed arrows are equally valid, there is no primary and fallback direction.
- Sign D4 always means 'mandatory turn right'; the arrow shown is decoration, the code itself fixes the direction.
- F3 specifically bans TRUCKS from overtaking motor vehicles, not cars or other drivers.
- F1 bans motor vehicles from overtaking EACH OTHER; mopeds are not motor vehicles, so passing a moped rider does not fall under it.
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Correct answer: Sign D4 always means 'mandatory turn right'; the arrow shown is decoration, the code itself fixes the direction.
The duty is the direction shown on the sign — the arrow determines the direction, not the code itself; the same code D4 can point a different way with a different arrow
Why learners get this wrong: Sign D6 (with two arrows, straight ahead and right) requires you to specifically drive straight ahead; turning right is merely a fallback option.