Reply to "Article: 90 Years Ago, the Los Angeles Subway Was Born in This Lost Tunnel"

There are at least a couple of other abandoned subways from the great era of traction.

Rochester, NY

From 1927 until 1956 Rochester, NY had  an approximately 7 mile subway built in the old Erie Canal bed.  This DVD sales pitch gives operating and abandoned scenes:

The Rochester subway was featured in the March 26, 1929 issue of Electric Railway Journal.

Newark, NJ Cedar Street Subway

The City Subway continues to run in Newark, NJ, but there was also another short subway into the multi level Public Service Terminal in downtown Newark. It operated from about 1914 to 1938 and there is an article and photos.

Here is an Electric Railway Journal article on signaling in the Newark Terminal that shows track diagrams.

This map shows the relationship between the City Subway and the Cedar Street subway.