Blasting will take place for about six months on the westbound side from Ashford Dunwoody Road to the Perimeter Center Parkway overpass.
The entrance ramp to Ga. 400 northbound will be closed to allow crews to restripe and install temporary concrete barriers on the ramp.
The Ga. 400 northbound flex lane between Abernathy Road and Pitts Road will return to a traditional shoulder on Friday, April 6.
Avoid the intersection of Hammond Drive and Roswell Road until they're done.