The wind from Hurricane Sandy is forcing officials to ban all nonessential vehicles from its four Delaware River crossings and close Philadelphia's interstate highways.

Walt Whitman Bridge (WPVI TV)

The Delaware River Port Authority says most traffic will be blocked from the Walt Whitman, Ben Franklin, Betsy Ross and Commodore Barry bridges until further notice.

Only vehicles carrying medical workers, hospital employees, public safety workers and others with permission to travel will be allowed to cross. Those who believe they qualify are told to take identification with them.

Corbett: Philly-area interstates closing

Gov. Tom Corbett says he's closing major interstates around Philadelphia until 2 a.m. as Hurricane Sandy passes over Pennsylvania.

Corbett said Monday evening the highways will close beginning at 7 p.m. They include I-95, I-76, I-476 and I-676. Philadelphia will close Route 1. Emergency vehicles can still travel the roads.

Corbett says the hurricane will pass over the Philadelphia area, tracking westward along Pennsylvania's southern counties. He says the hurricane's eye will pass south of Harrisburg by 2 a.m. and State College by 2 p.m. on Tuesday.

Wind gusts will be around 70 miles per hour, with sustained winds at 40 to 50 miles per hour. The storm could reach as far west as Johnstown before veering north.

He says he's also weighing closing the Pennsylvania Turnpike.