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Flex lanes to close on GA 400, reduction in speed limits due to construction

The changes are due to the SR 400 Phase 1 Design-Build project that will replace roads and bridges.

SANDY SPRINGS, Ga. — When Georgia drivers head down GA-400 in Sandy Springs on Saturday, they will notice some changes, one being - no flex lanes. 

The Georgia Department of Transportation said in continuing their construction project, these changes will be in place starting Friday, March 17 at 9 p.m. through Sunday, March 19 at 6 a.m.

  • Implement a permanent closure of the flexible shoulder lanes, or flex lanes, by restriping, removing pavement markings, temporary installation of traffic barrels and updating/changing signage
  • Narrow lanes, install barrier walls and shift traffic to the right from mile markers 13-15, near the Roberts Drive overpass bridge northbound and southbound
  • Reduce speed limits to 55 mph from Spalding Drive to Holcomb Bridge Road

Drivers are asked to use caution when riding through this weekend and to make sure they are paying attention to the new posted speed zone. The shoulder will be open for drivers to pull off into the work zone if needed. 

This project is part of the SR 400 Phase 1 Design-Build project—a project pulled forward from the forthcoming SR 400 Express Lanes project. The SR 400 Phase, 1 Design-Build project, is replacing the Pitts Road, Roberts Drive, and Kimball Bridge Road bridges over SR 400. 

"The three overpass bridges will be replaced with wider, taller structures to accommodate the future express lanes along SR 400," GDOT explained. "As part of the bridge replacements, multiuse paths will be incorporated into the new bridges."

According to the department, this structure update, in addition to improving travel, will help them as they move towards a major express lane construction project set for 2024. 

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