PennDOT says exit ramps will be equipped with large, flashing signage to alert wrong-way drivers — as well as drivers on Route 28 — that a vehicle is entering in the wrong direction.

Wrong-way driving signage goes up near key points of entry toward Harbor Bridge. ... TxDOT said they are in place to try to warn wrong-way drivers before they head straight into Harbor Bridge traffic.

The southbound exit to the airport will close from 9 p.m. to 5 a.m. through Thursday to install high-tech wrong-way signs, the Florida Department of Transportation said Friday in a news release.