“Streamliners” were operated by Union Pacific, Chicago & North Western, and Southern Pacific with some equipment “pooling” with Wabash and other railroads. The most famous trains were the City of Los Angeles and the City of San Francisco, departing from Chicago, IL for the West. Additional trains were known as the City of Portland and the City of St. Louis.
The biggest partners, UP and C&NW, advertised “Route of the Streamliners” on their box cars. In essence, each of the partner railroads “owned” portions of the train; they were true partners, not simply connecting railroads.
Today, these trains remain among the best remembered of all postwar lightweight passenger trains.