Detour signs are used to indicate an alternate route in advance of which condition?

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Multiple Choice

Detour signs are used to indicate an alternate route in advance of which condition?

Detour signs are used to guide traffic along an alternate route before you reach a road section that’s closed or blocked. The purpose is proactive routing: give drivers time to turn onto the approved detour and continue safely around the obstruction, preventing sudden stops or getting stuck at the closure. This differs from signs that warn about speed or pedestrians, and it wouldn’t be helpful to place a detour only after you’ve already encountered the closed section, which would cause confusion and backups.

Detour signs are used to guide traffic along an alternate route before you reach a road section that’s closed or blocked. The purpose is proactive routing: give drivers time to turn onto the approved detour and continue safely around the obstruction, preventing sudden stops or getting stuck at the closure. This differs from signs that warn about speed or pedestrians, and it wouldn’t be helpful to place a detour only after you’ve already encountered the closed section, which would cause confusion and backups.

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