In 1920, the Erie Canal became obsolete.  In 1921, the mayor of Rochester proposed an ordinance for the construction the subway system, which put the canal bed to use.  The proposed line extended 8.5 miles with 1.5 miles of it underground.  It ran in a northwest to southeast direction which also connected to various railways in the city.


Lipman, Andrew D. “The Rochester Subway: Experiment in Municipal Rapid Transit,” City Historian, Vol. 36, No. 2 (April 1974), pp. 1-24.