ST. LOUIS COUNTY, Mo. – Drivers in St. Louis County may be dealing with some notable delays Tuesday evening. A portion of Interstate 270 is closed near Interstate 64.

Some southbound drivers on I-270 are being rerouted to the westbound lanes of I-64 as a portion of I-270 remains closed.

MoDOT anticipates the closure on I-270 could take up to three hours to clear.

Authorities are responding to a crash in the southbound lanes of I-270 between the exits for Ladue Road and I-64.

Drivers are encouraged to use alternate routes, if possible, as crews work to clear the scene of the crash.

Check FOX 2’s traffic map for real-time updates.