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ST. LOUIS, Mo. (KSDK) -- Westbound I-70 was closeddowntownfor over 4 hours due to an overturned tractor trailer Saturday morning.

No one washurt, but a tractor trailer flipped on the Westbound I-70 ramp of the Poplar Street Bridge. Traffic wasbacked up for miles.

The accident happenedjust after8:00 this morning. Crews finally opened up the highway around 12:45 this afternoon.

No word on what caused the crash. NewsChannel 5 will bring you more information as it becomes available.

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