|Service type||Commuter rail|
|First service||January 20, 1975|
|Last service||January 13, 1984|
|Distance travelled||74 miles (119 km)|
|Track gauge||4 ft 8 1⁄2 in (1,435 mm)|
As Amtrak's mandate did not cover commuter operations Penn Central continued to operate a weekday commuter service between Detroit and Ann Arbor, Michigan after Amtrak had assumed control of its intercity operations. By the mid-1970s Penn Central asked to discontinue the service, citing dwindling ridership and the aging Rail Diesel Cars it used. Amtrak and the state of Michigan agreed to step in, and the Michigan Executive made its first run on January 20, 1975, running between Detroit and Jackson (to the west of Ann Arbor).:196
In the summer of 1975 the westbound Friday Michigan Executive operated all the way to Chicago, returning the following Sunday.:195 Declining ridership led Amtrak to discontinue the westbound Michigan Executive and truncate the eastbound train to Ann Arbor. Returning commuters took the Chicago-Detroit Twilight Limited. Amtrak discontinued the Michigan Executive on January 13, 1984, after Michigan withdrew its support.:197 State transportation officials estimated that the discontinuance would save $200,000/year, and daily ridership had dwindled below 60.