Well, not sure if exactly this but it sounds like what I am occasionally using to commute to Geneva, Switzerland. Regional train, traveling up to 120kmh (trains

Well, not sure if exactly this but it sounds like what I am occasionally using to commute to Geneva, Switzerland. Regional train, traveling up to 120kmh (trains have same speed limits as cars here apparently), then enters the Geneva and stops in like 6 places in its newly-built 'subway' (it doesn't have a lot of stops, but then again Geneva is tiny compared to megacities mentioned). I mean it covers all the stops there are in the city, of which with single line in small city there aren't that many. And then goes to neighboring France, and on the way back picks up french commuters coming daily for (much better paid) work. There are no dedicated subway trains per se that I am aware of, just this. Helps me a lot to get close to my workplace, although drawback of this is long stops, I guess due to being proper big double decker swiss train and overall a massive behemoth.