According to the Atlanta BeltLine Blog
Beginning the weekend of March 23, 2012, the bridge over Ponce de Leon Avenue will be raised off of its existing abutments to be remediated, retrofitted and repainted as part of construction. The stretch of road between Ponce de Leon Place and the Midtown Place Shopping Center (across from Ponce City Market) will be closed from March 23 through 26 and again from March 30 through April 1, 2012. All of the shops at Midtown Place will be open and accessible during this road closure.
The closures will start at 9 p.m. on Friday evening and will reopen by 5 a.m. Monday morning. Road signs have already been in place for the two weeks leading up to the closures to alert drivers on Ponce de Leon Avenue.
While the bridge is raised, crews will install decking and scaffolding to protect cars and pedestrians, remove old paint, prime the metal, and repaint it. The bridge will then be fitted with unobtrusive security fencing as required by the Georgia DOT. Additional weekend closures can be expected to lower the bridge and complete construction of the Eastside Trail.