BATON ROUGE, La. (AP) — Several major traffic arteries around St. John the Baptist and St. Tammany parishes are closed because of the lingering floodwaters of Hurricane Isaac.

The Louisiana State Police says Interstate 55 is closed in both directions from Interstate 10 in LaPlace to U.S. Hwy. 51 in Ponchatoula.

Interstate 10 is closed in several spots, including in both directions in the LaPlace area. Exit ramps at one Slidell stop were shut Thursday.

The Causeway Bridge over Lake Pontchartrain also was shuttered, according to the state police.

More road closures are available to drivers by calling 511 or checking www.511LA.org .