As Johnson notes, the two largest systems, in Philadelphia and New Orleans, are upgraded versions of original streetcar lines that have been in place for more than a century. This map doesn’t include San Francisco’s Muni Metro system or Boston’s Green Line; both are descendents of historic systems, Johnson says, but today they operate more as light rail lines. This image also doesn’t include tourist-oriented lines with limited hours of operation, such as Savannah’s River Street Streetcar.
![streetcar-graphic.jpg](https://erepublic.brightspotcdn.com/dims4/default/3e7f3e8/2147483647/strip/true/crop/660x1117+0+0/resize/840x1422!/quality/90/?url=http%3A%2F%2Ferepublic-brightspot.s3.us-west-2.amazonaws.com%2F67%2F3b%2F4e17a8b181efa647a64113c804f0%2Fstreetcar-graphic.jpg)