Streamlined, all-room sleeping cars appeared on the "Pioneer Limited" in 1948. With streamlining, the Milwaukee Road considered changing the name of the train to "Pioneer Hiawatha" but deferred to passenger preferences to retain the older name. The "Pioneer Limited" was unusual in that its streamlined cars were home built in the Milwaukee Road's Milwaukee Menomonee valley shops. For various periods in the "Pioneer Limited"s career the train employed Milwaukee Road sleeping cars and attendants rather than Pullman operated cars. After 1927 the train's sleeping cars were operated by the Pullman Company