Yeah, I think we need to set a relatively narrow definition if we're going to create a grab bag system.
I agree, though I find limiting it to heritage streetcars dissatisfying since this excludes a lot of the piddling little things that are specifically what I have in mind here, like the streetcars in Tempe, Dallas, etc.
"Streetcars" in general, maybe we need to restrict to systems with only 1 line. That gets us what, a dozen or so lines in the system? Greatly reduces the number of systems but keeps those that are more integral parts of the regional transportation network as their own things. At that point, we're basically excluding Portland, New Orleans, MUNI, MBTA, Pittsburgh, Cleveland RTA, and SEPTA, all of which have several lines or some degree of hybridization that blurs the line with light rail.
Nah, "only 1 line" is too restrictive since this also excludes places like Oklahoma City and El Paso (both have two lines).
That said I don't think something really counts as a streetcar unless it runs entirely or almost entirely in streets, which means of the cities you listed Portland and New Orleans are the only two where I'd say a "streetcar" exists.
Indeed, "must run entirely are almost entirely in streets" is a fine enough boundary for the grab bag system I'd say, though I'd offer the following clarifications to defuzz:
- if there are multiple lines run by the same operator in the same city, all of them will be checked against this criteria collectively such that either all are in or all are out (and given their own system).
- "in streets" does not necessarily mean "in mixed traffic", dedicated lanes or running in the median of surface streets still counts
- short sections in dedicated ROW are allowed, but any tunnels or elevated structures not shared with automobile traffic are immediate disqualification.
- vehicles must move under their own power (so, no cable cars).
This cuts out all the subway-surface trollies and anything with any nontrivial elements of "light rail" to it while leaving everything else.
On the topic of system consolidation, I do think we can merge all of the NJ Transit light rail lines into a single system. NJT already considers them to be a single "system" to some degree. Call it "NJ Transit Light Rail" and we're good.
Yeah, I intend to do this. Just haven't gotten around to it yet.