The California Department of Transportation will begin a four-month full closure of I-405/Red Hill Avenue Overcrossing from Main Street to Pullman Avenue tentatively starting Monday, Aug. 29, 2016 at 9 p.m. through Friday, Dec, 30, 2016.

The closure is needed to construct retaining walls and perform other bridge repair work.

This closure is part of a $9 million Embankment Stabilization project in the cities of Irvine and Costa Mesa.

Changeable Message Signs will be used to alert motorists two weeks prior to the closure.

Motorist may experience delays and are advised to avoid the area, use alternate routes, and check traffic conditions before traveling.

Once complete in early 2018, the project will reinforce the soil embankment along the local arterial surface street system.

For more on the Caltrans Red Hill project click here.