With the Great Depression, the Illinois Traction System staggered. The ITS relinquished many of its city streetcar lines in the 1930s, and due to the Public Utility Holding Company Act of 1935 it was forced to cut its ties with an affiliated firm that provided electrical utility services. The passenger railroad reorganized in 1937 as the "Illinois Terminal Railroad" (ITR) and continued to provide electric-powered interurban, long-distance multiple car passenger train service Peoria/Danville to St. Louis for almost another two decades. United States postal contracts helped provide revenue to make this service viable.