KNOXVILLE, Tenn. (WATE) — There has been heavy traffic in Knox County on I-40 as crews work to replace a sign, according to the Tennessee Department of Transportation spokesperson Mark Nagi.

Traffic backups were seen on the TDOT SmartWay map on I-40 westbound near mile marker 384 early Sunday morning. Nagi said the crews are replacing an overhead dynamic message sign.

There was heavy congestion in the area.

On the TDOT map, the traffic is seen going as far back as Hall of Fame Drive. There was also heavy traffic on I-75/I-640 as far back as Gap Road.

“Motorists should be alert for workers present, expect delays, and use extreme caution through the area,” Nagi said on Twitter around 12 p.m.

According to the TDOT map, around 2 p.m. traffic has been cleared on I-75. Around 3 p.m. traffic started moving on I-40.

Editor’s Note: This story has been updated.