Synonyms of detour
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bypassA bypass is a main road which takes traffic around the edge of a town rather than through its centre.
• A new bypass around the city is being built.
diversion (British)A diversion is a special route arranged for traffic to follow when the normal route cannot be used.
• They turned back because of traffic diversions.
Thesaurus for detour from the Collins English Thesaurus
a deviation from a direct, usually shorter route or course of action