Early SP intermodal train By Mitch Horner | February 9, 2026 Email Newsletter Get the newest photos, videos, stories, and more from Trains.com brands. Sign-up for email today! Get Updates An A-B-A set of F units departs San Francisco with Southern Pacific train 372, the piggyback-heavy Advance Overnight for Los Angeles, in August 1955. William Harry photo Share this article Print Facebook