Same reasons as railway I suppose - its expensive to destroy a city centre to get the land needed for it.
But you started the comparison with the underground thing.
But the city already has highways. If we started fresh sure let’s do more rail.
My point is just, what infrastructure can you do with say <$1b? It’s a lot of money but not building a whole new railroad kind of money. You can get a few station upgrade projects, a couple of electric trains, etc.
There’s room for private funding of a new electric car company. Save the tax dollars for big infrastructure projects.
New electric car companies only intensity the always insufficient highways & daily rush hours adding time to peoples commutes.
Also cars cost money, we tend to forget that when talking about rail.
With less than 1bn you can build railroads between cities.
Some random sniplet (californiapolicycenter.org:
According to the HERS analysis, adding a new lane to an interstate on flat terrain in a rural area costs $2.7 million per lane mile. To do the same thing in a major urbanized area costs $62.4 million per lane mile, more than twenty times as much. Even minor projects display wide ranges in cost. Resurfacing an existing lane of a principal arterial in a flat, rural area costs $279,000 per lane mile. To do the same in a major urbanized area costs $825,000 per lane mile, three times as much.
(That is without car related costs with fall on individuals, or environmental costs that arent counted at all.)
California at the same time is building high-speed rail between LA & SF at 66 million per mile - that is including the railway stations & the city tunnels mentioned previously at billions per mile.
And that’s also a stupidly mismanaged project with 200+ million dollars in literally just planning mistakes and human errors (or sabotage).
With low maintenance & basically unlimited capacity I can only see that as a cost efficient project that should have been done 50 years ago.
