OnTrack was a regional rail line that operated in Syracuse, New York from 1994 to 2007. During much of its operation, Syracuse was the smallest city in the United States to have regional train service. The line ran from Colvin Street on the city's south side via Syracuse University and Armory Square to the Carousel Center, using four Budd Rail Diesel Cars (RDC-1) built in the 1950s. It was operated by the New York, Susquehanna and Western Railway.