What is the term for rerouting traffic onto a temporary bypass road?

The term for rerouting traffic onto a temporary bypass road is "Detour." A detour involves redirecting vehicles from their regular route to an alternative path typically due to road construction, accidents, or other obstructions. This alternative route is often necessary to ensure the safety of road users and to maintain the flow of traffic even when the original road is unavailable.

While "Diversion" is a close concept often used interchangeably with detour, it can imply minor changes in traffic flow rather than the complete rerouting that a detour denotes. In the context of traffic management, detours are specifically set up to guide motorists around obstacles. Other terms such as "closure" refer to the complete shutting down of a road section, and "re-route" describes changing a route but does not specifically imply a temporary bypass.