The high metal framework holding large green directional signs collapsed onto northbound lanes of East Loop 820 early Thursday after a suspected drunken driver hit the base of the structure, police said.
The structure, known as an overhead gantry, fell about 3 a.m. Northbound lanes were closed until just before 8 a.m.
The driver, who had minor injuries, was taken to a hospital, authorities said.
A driving-while-intoxicated investigation is underway, police said.
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