Would you build rail transit underground in a new city? A large part of why subways are even things to begin with was because they were added late in the develo

Would you build rail transit underground in a new city? A large part of why subways are even things to begin with was because they were added late in the development of most cities that justify building them. Newer cities like Dallas have above ground commuter rail exactly because the city still had room to build it above ground. If anything, it is much more valuable to segment the city in ways that you don't need subways or roads. You should have districts that are internally navigable strictly by foot, bikes and tram between adjacent districts, and only have rail / road when going beyond the local microcosm of city. You want greenery anyway, you might as well put it in the bounding lines between regions of your city and have the roads / rail between those to minimize noise pollution outside of the transit hubs.