About Direction of travel and overtaking bans: D-signs and F-signs: which statement is WRONG?
F1 bans motor vehicles from overtaking EACH OTHER; mopeds are not motor vehicles, so passing a moped rider does not fall under it.
Sign D6 (with two arrows, straight ahead and right) requires you to specifically drive straight ahead; turning right is merely a fallback option.
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.
F3 specifically bans TRUCKS from overtaking motor vehicles, not cars or other drivers.
Explanation
trap: an equal choice read as a ranking. 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