What is the last sign to be set up in a construction zone?

The last sign to be set up in a construction zone is the "End Road Work" sign. This sign serves a crucial purpose as it indicates to road users that they have exited the construction zone and can expect normal traffic conditions ahead. It effectively signals the conclusion of any construction-related changes or restrictions that might have been in place, thereby reassuring drivers that they are no longer within the parameters of work being actively conducted on the road.

Other signs, like "Detour Ahead" or "Road Closed," are meant to alert drivers to upcoming changes or direct them away from the construction area before they reach it. The "Construction Zone Ahead" sign also communicates potential hazards and changes in road conditions but is used even earlier in the process. Therefore, "End Road Work" is specifically placed as the last sign to indicate a return to standard road conditions.