Traffic is slowly moving on I-75 in Cobb County after work crews cleared an overturned tractor-trailer that blocked all northbound lanes Friday afternoon.

The crash happened just before 12:15 p.m. at the North Marietta Parkway exit. The truck was cleared and all northbound lanes reopened three hours later, according to the Georgia Department of Transportation.

Traffic remains backed up in both directions on the interstate. Drivers should use U.S. 41 as an alternate route, the WSB 24-hour Traffic Center reported.

Officials have not released any information about what caused the crash or if anyone was injured.

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