Because there's a huge ecosystem that is substantially dependent on private use of roadways - car manufacturers, sellers, insurers, storage facilities, cleaners, and repairers; petrol extractors, refiners, transporters and sellers; and so on.
Each of these parties has a vested interest in maintaining the perception that driving is the baseline mode of transport and anything else is a deviation from that which requires extra consideration before it should receive any resources.
On the one hand that's also a lot of jobs and profits, but on the other hand if all this activity is in service of a mode of transport that causes considerable short and long-term damage, and is less efficient for many journeys, then it means we're wasting labor and resources that could be put to better use.
These are the same people for whom owning a car is an essential part of life.
roads are much cheaper per mile than rail, so you can have more roads than you can have rail.
you can also have lower grade roads, which is once again, cheaper (so you can have more of it). You cannot have lower-grade rail - the train will crash.
Therefore, to provide a massive network of transport, roads are the only option. Rail provide cheap point-to-point transport, but only make sense between heavily populated centers, and therefore, you can expect to make back the cost of the rail from this dense usage.
> Rail provide cheap point-to-point transport, but only make sense between heavily populated centers
Yes, so the idea is to build rail for those use cases (which is somewhat the case in Europe, but not in US).
Rail can absolutely be made to different standards. High speed rail vs a tramway, and everything in between.
Exactly as with roads, the more you pay the faster the vehicles can go. Except with close to zero accidents.
Because you need roads to e.g., get produce from a farm to the grocery store. You can’t have a functioning society that doesn’t involve roadways for moving people and goods the “last mile.”
It’s very weird how people talk about roads as a sort of universal public good whose construction and maintenance needs to be financed by local authorities and taxation. Yet rail is expected to not just stand on its own two feet but to yield a profit. Both facilitate commerce and improve a regions productivity (rail inarguably does so with greater efficiency, especially when integrated into a public transport system) - why is rail treated so differently?