ORTS/MSTS Activity--Amtrak #3 Southwest Chief 1995. This is the fourth segment of Amtrak's #3 the Westbound Southwest Chief. This morning we're on the La Junta Sub. Dispatcher has informed you, two private cars are to be attached before leaving Newton, KS. The La Junta Sub is mostly single track, however there is not much traffic. The activity ends when boarding is complete at La Junta, CO. By B. LeBoeuf