Analysis of information sources in references of the Wikipedia article "Broad-gauge railway" in English language version.
Worst of all, not all city systems were built to the standard American and European gauge of 4'-81⁄2". Pittsburgh and most other Pennsylvania cities used 5'-21⁄2", which became known as the Pennsylvania trolley gauge. Cincinnati used 5'-21⁄2", Philadelphia 5'-21⁄4", Columbus 5'-2", Altoona 5'-3", Louisville and Camden 5'-0", Canton and Pueblo 4'-0", Denver, Tacoma, and Los Angeles 3'-6", Toronto an odd 4'-107⁄8", and Baltimore a vast 5'-41⁄2".
