60. 迂回路
迂回路は、通常経路が閉鎖、遮断、利用不能なときに使う一時的な代替経路です。工事、事故、イベント、洪水などで設定されます。仮設方面標識に注意し、必要に応じて減速し、慣れない道路、変更された優先関係、増加した交通を予想して運転します。
What is a detour?
A detour is an alternative route that directs traffic around a closed, blocked or restricted section of road.
Why are detours used?
Detours may be introduced because of roadworks, accidents, flooding, public events or other temporary obstructions that prevent normal use of the road.
Do you have to follow a detour?
Drivers must follow mandatory traffic signs and authorised traffic directions. A signed detour should be followed when the normal route is closed or restricted.
Are detours always temporary?
Most detours are temporary and remain in place only while the normal route is unavailable, although they can sometimes last for an extended period during major works.
Should you drive differently on a detour?
Yes. Detours may use unfamiliar or smaller roads, so drivers should reduce speed where necessary, watch for changed priorities and follow temporary signs carefully.
What is the difference between a detour and a diversion?
Detour and diversion generally describe the same concept: an alternative route around a road that cannot be used normally. The preferred term varies between countries and languages.

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