Forest Park Parkway, which currently runs underneath Kingshighway near the BJC HealthCare campus, will be raised to connect and be at-grade with Kingshighway.

Kingshighway will be open in both directions. The existing Kingshighway bridge over Forest Park Parkway will be left in place and filled underneath.

The project had been set to start in July but was delayed.

Forest Park Parkway runs under Kingshighway, which can make it difficult for drivers to get to Barnes-Jewish Hospital, as well as to the Central West End and Forest Park, the hospital said.

Those headed east on Forest Park couldn’t turn onto northbound Kingshighway. Drivers on Kingshighway couldn’t get to westbound Forest Park Parkway from either direction.

Construction is to be done overnight, between 7 p.m. and 5 a.m. Kingshighway will be open during the day, but some lane closures are expected overnight. Forest Park Parkway between Kingshighway and Euclid Avenue will be limited to just one lane in each direction.

It’s hoped the project will make the intersection of Forest Park and Euclid, where many pedestrians cross, safer as well. Now, faster eastbound traffic coming from beneath Kingshighway mixes there with slower eastbound vehicles.