Trackage of the Chicago North Shore & Milwaukee Railroad is shown in green. Local streetcar service was provided on 6th Street until 1951. Thicker line indicates private interurban right of way, mostly on an embankment.
Trackage of the Milwaukee Northern Railway is shown in blue. Milwaukee Northern also provided local streetcar service, thicker line indicates private interurban right of way. Milwaukee Northern was absorbed by The Milwaukee Electric Railway & Light Co. in 1928.
Route numbers are shown in parentheses, with most route numbers still in use by today's bus routes.