Here’s the Arizona & California 708 train arriving at the ATSF interchange in Cadiz. The A&C uses the Santa Fe system for assigning a symbol to this train. 7 indicates the origin in Arizona or New Mexico, 0 indicates a local, and 8 indicates a destination in Southern California. The Santa Fe local out of Barstow, CA, symboled 807, has recently arrived as well. They will swap cars in an intricate ballet then return to their respective terminals.