The Ann Arbor Railroad (reporting mark AA) is a Class III Railroad that operates fifty miles of track from Toledo, Ohio, to Osmer, Michigan. The railroad is operated by Watco and is based in Howell, Michigan. Prior to Watco's purchase of the railroad in 2013,^[1] the railroad was operated by the Ann Arbor Acquisition Corporation from 1988 to 2013, by the Michigan Interstate Railway from 1977 to 1988, and as a privately owned enterprise prior to 1977.

This article relies largely or entirely on a single source. (April 2023)

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Ann Arbor Railroad

Tracks of the Ann Arbor Railroad in downtown Ann Arbor, Michigan
Overview
Headquarters	Howell, Michigan
Reporting mark	AA
Locale	Michigan and Ohio
Dates of operation	1988–Present
Predecessor	Michigan Interstate Railway
Technical
Length	50 miles (80 km)

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The Ann Arbor Railroad operates 83 miles (134 km) of track between its main terminal, Ottawa Yard, in Toledo, Ohio, and Ann Arbor, Michigan, the interchange point with the Great Lakes Central Railroad and Norfolk Southern. A branch line known as the Saline Branch stretches four miles from Pittsfield, Michigan, to Saline, Michigan. The Saline Branch has been used in the past to serve the Faurecia Automotive Components Plant located in Saline, Michigan, but is not currently being used in revenue service. The Ann Arbor Railroad also leases and operates an industrial lead in Toledo owned by the Norfolk Southern. Much of what the railroad transports is "bridge traffic" and is received at either end of the railroad and transported for interchange with another railroad at the opposite terminal. A variety of different cargoes are transported ranging from grain to liquefied petroleum gas to wooden poles. In Toledo, the railroad serves Chrysler transporting finished vehicles from the Toledo Complex.

Hallett Tower, the only remaining operational interlocking tower in Ohio, ceased operation in September 2019 with all dispatching duties being shifted to the dispatch center in Pittsburg, Kansas. While the tower itself is still standing, it is now being utilized by the signal dept.

The Ann Arbor Railroad is headquartered in Howell, Michigan.^[1] Its main business is serving manufacturers, especially the automobile industry.^[1]

• For 1895 to 1977, see Ann Arbor Railroad (1895–1976)
• For 1977 to 1988, see Michigan Interstate Railway

• Toledo, Ohio:
  • Norfolk Southern
  • CSX
  • Canadian National
  • Wheeling & Lake Erie Railway
• Osmer, Michigan:
  • Great Lakes Central Railroad
• Milan, Michigan:
  • Norfolk Southern
• Diann, Michigan:
  • Canadian National
  • Indiana & Ohio Railway