Maintenance on two Gwinnett County highways will require shoulder or median lane closures this week.

The Georgia Department of Transportation will sweep Ga. 378 from Lilburn to Norcross and will perform shoulder maintenance on I-985. The work will take place from 7 a.m. to 5:30 p.m. weekdays, weather permitting. The department urges motorists to slow down in these and other work zones.