@LunaDragofelis @RuthODay also not an option because that would not fit either, and whilst a "#Dangletrain" Like the #SkyTrain and #OverheadMonorail would be cool, but cross-compatibility is zero and acceptance for something like it - and the necessary construction, of elevated stations which further choke transport of people and is harder to make accessible than to replace the entire rolling stock with low-floor vehicles that have automatic ramps..

• Same for any "Light Rail" on elevated tracks above ground...

See for yourself...

• There's no way to unfuck this without committing "political suicide" as a mayor and have massive protests by #NIMBYs

And if that's "not futuristic enough", consider #OverheadMonorail|s as alternative since they don't share the street layer, are cheaper than digging tunnels and even more comfy at higher speeds whilst having the rails protected from the elements, thus requiring less maintenance...

https://www.youtube.com/watch?v=NeYTtlXywUI