Horse and cart, no. But some cities have banned cars and replaced them with various alternatives, and it works.

There are alternatives to the car culture we have. It would require significantly rebuilding how we build infrastructure, but the result could be much safer, cleaner, and less stressful.

Of course Americans would rather die, but counties of sane people might be able to work it out.

First off, you don't know if duskdozer doesn't want to go back to cart and horse. Second even if they don't there's an enormous amount of space between horses and https://parkingreform.org/resources/parking-lot-map/ a third of my downtown being parking lots, downtown which is already the dense bit.

The car did not replace the horse and cart. This is an oft cited and widely believed myth. It replaced mostly walking, but also cycling, trollies and trains. And it didn't do so until after a huge build out of infrastructure to accommodate drivers at the cost of everything else.

After the building of highways and roads cities were no longer walkable, people had moved out into the suburbs, their jobs were now a couple of towns over and they couldn't even walk to the grocery store. Cars enabled that, but politicians and capitalist were the ones who did that.