Boring company maybe? It's not abandoned, but they likely gave up the idea of an underground system of roads under a city, and just focus on single project individually like traditional construction company.
It's far from abandoned. They're actively building TBMs at their factory and tunneling in Vegas and it's pretty different from any other transportation project I'm aware of.
It's far from abandoned. They're actively building TBMs at their factory and tunneling in Vegas and it's pretty different from any other transportation project I'm aware of.