FORSYTH COUNTY — Crews with the state Department of Transportation have begun installing thousands of raised pavement markers this week on state routes in north Georgia where they may have been scraped off by snowplows during winter storms.

In addition, the department reported that crews continue to remove debris, fallen limbs and damaged trees from rights of way in the hardest hit counties, which include Forsyth, Dawson, Gwinnett and Lumpkin.

The installation of raised pavement markers requires rolling lane closures that can cause delays. The effort is expected to take several months, according to the DOT.

The markers are reflective delineators that help motorists see lane lines during low light conditions, particularly at night.

Motorists are advised to slow down and move over one lane when they see crews working in or alongside state routes and interstates.