SFGTV December 18, 2012
Through that agonizing slow down. So, very grateful for young and his crew for that project. And weve also the signal crews which terry here is to represent, led the upgrade of the automatic train control system, the signal loop. A loop of wires that run through the subway that basically provide for the communication of the automated train control system. When our trains are in the subway, they operate on an automatic mode that allows them to move much more quickly and efficiently than they would if they were operating in manual. And when this cable is not functioning, the automatic system goe...