>>1167793Wuppertal has this, where the tracks are suspended above the river for most of the stretch, and over streets for the last part.
Many cities in Japan also have similar suspenstion railways.
Dublin has parts of the mainline elevated with Victorian engineering.
Chicago's "L" is also an elevated railway above steet level.
New York City's Metro uses elevated track for sections into Brooklyn (although the system in underground for Manhatten).
The major issues are that grade separating the rail system is expensive, and while this isn't as expensive as say, boring underground, the costs are still high. There are other issues related to the eye sore that is an elevated system, and this is probably the main reason why these things are opposed, it's also why trams and trolleybuses are getting harder to implement. Rich people who have property in parts of a city will lobby really hard to make sure that no visible infrastructure is there. Ultimately, it's a problem for cities with expanding populations, but either you have an Asian country which has no gentrification problems, or you have a European/NA country with issues where the rich owners of apartments hate seeing anything which looks like infrastructure.
