The collection is arranged primarily by format and broad subject. The formats are
kept separately, with celluloid negatives making up the first 20 boxes of the
collection, and black and white prints in the last three boxes of the collection.
From there, the boxes are arranged by broad subject, with the streetcars and
interurbans coming first, followed by locomotives. Within those categories the most
often occurring transportation companies (TMER&T and TMER&L) come first in
the order, the other companies are listed afterwards. Within each grouping by
company, the images are arranged in order by the numbers that appear on the
streetcars, interurbans, or locomotives. The few images that did not depict
streetcar or locomotives with visible numbers have been grouped at the end of the
groups by company.
