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ST. LOUIS (KTVI) – Know before you go, two big road construction projects will impact drivers this month in the city of St. Louis.

Starting on Monday, the Missouri Department of Transportation will begin removing the Grand Bridge over Interstate 44. Crews will demolish and rebuild the bridge in two halves so that Grand can remain open. One lane in each direction on Grand will be closed between 9 am and 3 pm as MoDOT begins removing the medians on Grand between Russell and McCree. Officials say the project will not impact ambulance traffic to SSM Saint Louis University and Cardinal Glennon Children’s hospitals.

On June 17, both Grand and Interstate 44 will be closed for the weekend as demolition of the bridge begins. The project will take until December to finish.

Meanwhile, the section of Forest Park Avenue that runs under the bridge at Kingshighway will be closed and raised to meet the level of Kingshighway, turning it into a four way intersection. The biggest benefit of creating that new intersection will be for drivers headed east on Forest Park Avenue, exiting to head south toward Barnes-Jewish and St. Louis Children’s hospitals. Right now, they have to cross five lanes of traffic immediately at the end of the ramp to Kingshighway.

BJC and Washington University is paying the $10 million cost of the project. Forest Park will be closed for a good part of the construction, but Kingshighway will be open the entire time.

Construction is expected to begin in July or August and take 12 to 14 months to complete.