Elon Musk's Boring Company cut a 1.7-mile tunnel beneath the streets of Las Vegas that's meant to offer a clean way of clearing up traffic in Sin City. Since it opened, the tunnel has drawn criticism for its high construction costs and relatively low passenger numbers compared with traditional mass transit systems like trains and subways. Now, the company behind it has been accused of skirting "building, environmental and labor regulations," amid a lack of oversight on the project.