The federal government considers high-speed rail service to be rail service which at any time reaches the speed of or higher. In 2006 the Detroit–Chicago corridor was designated by the Federal Railroad Administration as a high-speed rail corridor and in October 2010, the State of Michigan received US$150 million from the federal government to increase track speeds to between Kalamazoo and Dearborn. In 2016, work to allow higher-speed operation on 41 miles of track between Battle Creek and Jackson, including "...replacing 26,000 railroad ties, repairing or installing 15 track switches, realigning or modifying 29 railroad curves, repairing 23 railroad grade crossings and improving road profiles at crossings", was completed.
