Concrete Relocation involves which traffic control measure?

• A. Bridge decks opened to traffic immediately after placement.
• B. Bridge decks closed for 7 days post-placement.
• C. Bridge decks closed for 14 days post-placement.
• D. Bridge decks must be relocated after 3 days.

Answer: (B)

Controlling traffic during concrete relocation relies on giving the fresh concrete time to gain early strength so it can withstand loads without damage. The correct measure is to keep the bridge decks closed to traffic for seven days after placement. This period protects the surface during the critical early curing phase and helps prevent scabbing, premature cracking, or deformation under traffic. Opening sooner would expose the new concrete to loads it isn’t ready to support, while a longer closure isn’t necessary and would stall the project. Waiting 14 days is longer than the standard requirement, and a 3-day closure does not provide adequate curing time.