The inside of Hallett Tower which is located on the north side of Toledo.  It is the crossing of the Ann Arbor Railroad and the Toledo Terminal (CSX).  The tower, operated by Ann Arbor, acts as the dispatching office for the Ann Arbor Railroad north to just north of Ann Arbor and the branch from Pittsfield Jct. to Saline.  The photo above is of the model board, a staple in almost all interlocking towers.  Below is the electromechanical interlocking machine which controls the switches, signals and direction of trains.  2004  [Nathan Nietering photos]