Mercury Blvd. closure Published Aug. 24, 2018 By 412th Test Wing Public Affairs EDWARDS AIR FORCE BASE, Calif. -- Due to Edwards AFB flight test operations, Mercury Blvd. at the southern portion of the base will be closed Monday, Aug. 27, through Thursday, August 30, from 8 a.m.-3:30 p.m. Motorists are advised to plan accordingly.