The Milwaukee Road aggressively marketed passenger service through much of its history, maintaining a high quality of service until the end of private intercity passenger operations in 1971. The Milwaukee prided itself on its passenger operations, providing the nation with some of its most innovative and colorful trains. The railroad's home-built equipment was among some of the best passenger equipment ever run on any American railroad. The Milwaukee's reputation for high-quality service was the principal reason that Union Pacific shifted its service to the Milwaukee Road for its "City" streamliners in 1955. The Milwaukee Road's Pioneer Limited was one of the first named trains and its colorful Hiawatha trains were among the nation's finest streamliners. The post-World War II Hiawatha trains remain a high-water mark for passenger train industrial design. Starting in November 1955, the Milwaukee Road assumed joint operation of the Union Pacific's City of Los Angeles, City of Portland, City of Denver, and Challenger trains as well as the UP/Southern Pacific City of San Francisco. After assuming operation of the UP's services, the Milwaukee Road gradually dropped its orange and maroon paint scheme in favor of UP's Armour yellow, grey, and red, finding the latter easier to keep clean. The Milwaukee Road's streamlined passenger services were unique in that most of its equipment was built by the railroad at its Milwaukee Menomonee Vallay shops, including the four generations of Hiawatha equipment introduced in 1933–34, 1935, 1937–38, and 1947–48. Most striking were the "Beaver Trail" observation cars of the 1930s and the "Skytop Lounge" observation cars by industrial designer Brooks Stevens in the 1940s. Extended "Skytop Lounge" cars were also ordered from Pullman for Olympian Hiawatha service in 1951. The Olympian Hiawatha set, as well as some full-length "Super Domes" were later sold to the Canadian National Railway. Regional passenger trains that the Milwaukee Road operated from Chicago up to Amtrak's assumption of passenger operations in 1971 included the Twin Cities Hiawatha serving Minneapolis, the Sioux serving Madison, Wisconsin, the Milwaukee Express serving Milwaukee, and the Varsity serving Madison. Amtrak still operates the Hiawatha Service along the Milwaukee Road's former Chicago-Milwaukee route. For years, the Milwaukee Road also operated an extensive commuter rail service in the Chicago area. One branch served the northern suburbs and extended into the outer suburbs of Milwaukee, while another branch served the western suburbs. These services passed to the Regional Transportation Authority in 1982 after the Milwaukee Road's bankruptcy. They are still operated today by Metra, Chicago's commuter rail agency, as the Milwaukee District / North Line and Milwaukee District / West Line.
