By CBS3 Staff

PHILADELPHIA (CBS) – An overturned tractor-trailer on the Ben Franklin Bridge is causing traffic delays Thursday morning. The crash happened at the base of the westbound lanes, on the Philly side, around 12:30 a.m.

Crews are still unloading the cargo.

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Overnight roadwork also has one westbound lane blocked between the toll plaza and the ramp to North 5th Street.

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One person was transported to Jefferson Hospital. No word on their condition.