A person was struck and killed along Interstate 85 in Gwinnett County early Thursday morning, causing all lanes to be shut down.

It happened in the southbound lanes of I-85 at Boggs Road in Duluth.

A little after 7:30 a.m., Gwinnett police said the lanes had been re-opened, but traffic remains sluggish after the lengthy closing.

According to Georgia Department of Transportation, speeds reduced to 30 miles per hour as far north as I-985 at Highway 20.

Traffic was being diverted on the access ramp to Pleasant Hill Road.