A listing of common tags that you can use to sort through the collection to find the maps you’d like to see.
#subway (includes metro systems, the Underground, etc.)
#light rail (has own Right of Way or ROW)
#tram (includes streetcars, shares ROW with traffic)
#commuter rail (includes heavy rail)
#passenger rail (long distance/interurban trains)
#high speed rail
#bus (all motor vehicle services, including trolley bus)
#funicular (inclined rail)
#aerial lift (gondolas, aerial cable car, etc.)
Unfortunately, the “Search” feature in my theme is a bit buggy, but you can find a city or country you’re interested in by copy-and-pasting:
into your browser’s address bar and replacing the “xxx” with what you’re after. I tag every review comprehensively, so you should find stuff pretty easily.