Detour coming to South Gate Published March 23, 2017 412th Civil Engineering Group South Lancaster Blvd. will be closed from the Edwards AFB sign to Mercury Blvd. for a pavement repair project. South Gate will stay open throughout construction. Motorists will need to use a detour route -- 140th St. E. to Mercury Blvd. -- to bypass construction and reach south gate. Construction work will take place April 3-June 1. Questions or concerns can be directed to Bayram Kurbanov at 661-858-7159.