A busy drawbridge connecting Philadelphia to southern New Jersey reopened to traffic about 11 hours after becoming stuck in the open position.  

The Tacony Palmyra Bridge, which carries about 70,000 cars daily across the Delaware River, was lowered at about 10 a.m. Thursday and reopened to cars shortly before noon.

Commuters were directed to the Betsy Ross Bridge to the south after the bridge couldn't be lowered from the opened position starting at about 1:30 a.m. Thursday.

The 84-year-old drawbridge connects Route 73 from Burlington County, N.J., to the Tacony section of northeast Philadelphia and opens to allow ships to pass.

The Burlington County Bridge Commission, which is responsible for maintaining the span, said engineers are currently investigating what caused the bridge to malfunction.