Territory control on all heavy and light rail lines by the Central Control Facility (CCF) consisting of main track, interlockings, turnback tracks and yard lead tracks to the Yard Limit sign. Mainline tracks are identified as: * AR/BR/YR- Normal westbound tracks from Yard Limit. * AL/BL/YL- Normal eastbound tracks to Yard Limit. * Track 1- Designated northbound track from Long Beach to Los Angeles (Blue Line). * Track 2- Designated southbound track from Los Angeles to Long Beach (Blue Line). * Track 1- Designated westbound track from Norwalk to El Segundo (Green Line). * Track 2- Designated eastbound track from El Segundo to Norwalk (Green Line).