"400", Shoreland "400", Dakota 400 and the Kate Shelley 400. CNW ceased running the Twin Cities 400 in 1963, and all intercity passenger service on CNW ended with the formation of Amtrak in 1971. Amtrak bought a dozen of C&NW's bilevel railcars and painted them into Phase III paint, they were used with Amtrak's EMD F40PH locomotives. They are not in use today. In conjunction with Union Pacific and Southern Pacific, the North Western operated some long distance passenger trains, including the Overland Limited, City of Los Angeles, City of San Francisco, City of Denver, and the Challenger. These services lasted from 1889 to 1955, after which the CNW route to Chicago was changed to the Milwaukee Road's on account of poor track conditions. Chicago and North Western also operated commuter train service in the Chicago area, where they developed what was perhaps the first control car. A modified gallery car was built in 1960 with locomotive controls to allow push-pull operation. Today, it is preserved at the Illinois Railway Museum. The C&NW also pioneered the concept of Head End Power (HEP), generating 480 volt electricity from the locomotive to power the air conditioning, lighting, and heating on the new bi-level cars. This eventually became the standard for all railroads in the United States. Three commuter lines radiated from North Western Station; the C&NW West Line to Geneva, Illinois; the C&NW Northwest Line to Harvard, Illinois; and the C&NW North Line to Kenosha, Wisconsin. At Crystal Lake Junction, some trains branched off to Williams Bay and Lake Geneva, Wisconsin. The West Line also had branches to St. Charles, Aurora, Freeport, and Crystal Lake. A fourth commuter line operated on the KD Line between Kenosha and Harvard until 1939. In 1974, responsibility for the commuter lines and equipment ownership transferred to the newly formed Regional Transportation Authority, whose rail division was later branded in 1984 as Metra. The C&NW continued to run the lines under a "purchase of service" contract, in which the railroad maintained the right-of-way and operated trains on behalf of Metra. All three C&NW commuter lines live on in the Metra system, and are still operated by Union Pacific under a purchase of service contract, with the Geneva line having been extended west to Elburn. However, service on the branch to Williams Bay was gradually cut back over the years, also resulting in changes to the name of