A tractor-trailer crashed and tipped onto its side in South Dallas County Wednesday night, closing southbound Interstate 45 for hours.
The crash was reported at about 8:45 p.m. There is no word on whether any other vehicles were involved.
Hazmat crews were called because the overturned 18-wheeler is spilling oil and fuel onto the freeway.
Southbound traffic was diverted onto I-20 until authorities reopened I-45 at about 5 a.m.
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No injuries have been reported.