Golden Gate Bridge Road Zipper in action at the tail end of its morning run

Some closeups of the Barrier Transfer Machine (BTM) repositioning the new Moveable Median Barrier (MMB) on the Golden Gate Bridge at the tail end of its Thursday morning run on January 15, 2015. It started at the northern (Marin) end and this video is of it reaching the end of its run at the southern (San Francisco) end, near the toll plaza. The new Moveable Median Barrier (MMB) system is about 13, 340 feet of 12inch wide and 32inch high steel clad units filled with high density concrete pinned together