All lanes of Synergy Park Boulevard will be closed at the Silver Line railroad tracks from Thursday, Aug. 31 at 10 p.m. to Friday, Sept. 1 at 6:30 a.m. The closure, originally scheduled to take place Aug. 24-25, is necessary so concrete can be poured for the Silver Line railroad bridge. Detour signs will be in place, but motorists are advised to avoid the area if possible.