A driver was injured Wednesday when his tractor-trailer overturned at Spaghetti Junction in DeKalb County, officials said.

The wreck occurred about noon and shut down the I-85 North ramp to I-285 East for more than 90 minutes. It’s unclear what caused the crash, but the truck came unhitched from its trailer, causing lengthy delays as crews removed the vehicle from the road.

The driver suffered minor injuries and was taken to the hospital, according to DeKalb police. Traffic was diverted off I-85 North at Chamblee Tucker Road until all lanes were reopened just before 1:30 p.m.