[so33]

>Isn't it wonderful how the car allowed a large number of families to own a home with a piece of land, yet have access to the amenities of a city?

That was an illusion. House prices are soaring in the inner suburbs (case in point: the Bay Area) to the point of complete unaffordability, forcing people out further and further from where they work and, consequently, creating situations where commuters drive for hours every day because there is no other choice.

To drive to the city, you have to find a place to park your car. As more people want to drive to access the amenities of a city (and they have to, because they might live more than an hour away as they can’t afford anything closer), they will need to pay more and more to park, because of the costs of real estate.

And tunnels are no panacea. The congestion created by single occupancy trips created by people who might be living an hour or more away from their destination will persist.

Density would go a long way to solving some of these problems. Simple things from lowering minimum lot sizes, to mid size apartments and condos, would increase access to home ownership. But we can’t have anything lowering those property prices, can we?

[njarboe]

A tunnel can have any kind of transport running in it as you want. Cars, buses, and trains at the same time. A toll tunnel that is run full will be wildly profitable and would inspire others to build them. "The Boring Company" already has the tech, we just need to work out the regulatory system so that they can build across the multiple small cities in the LA basin. Below a certain depth you can't even tell the tunnel is there.

A controlled tunnel system would be easily driven by today's automatic cars. It pick you up and goes back home (no parking problem), runs on electricity from your sunny California rooftop solar array, and works as a peaker power source for the grid when you aren't using it. Bring me a future that is better than the past please.

[TheCoelacanth]

The problem is that digging a tunnel is expensive even when amortized over the 30,000 passengers per hour that a subway line can carry. When you amortize it over the 2,000 passengers per hour that a lane of single-occupancy vehicles maxes out at, the expense is completely outrageous.