| >No they don't. There's no insulation for underground tunnels for subways; just steel liners and reinforced concrete, at least according to NFPA 130. No sprinkler systems. So no difference here. Not sure where you're getting that info. I just looked up NFPA 130 and it specifically calls for multiple types of insulation (for cables as well as concrete and steel) as well as automated water sprinkler systems, and even standpipes for firefighters. >Correct me if I'm wrong, but to my knowledge, Tesla has removed LIDAR-based cameras in their lineup. Tesla doesn't use LIDAR but they do use ultrasonic sensors. Tesla's existing autopilot systems works just fine on completely dark, unlit roads. I don't see why these skates would be any different. >Yes, I know. And those trains communicate via access points placed on the tracks, each of which are run with fibre and power cables. Now that bare tunnel is no longer bare. Even with fibre and low voltage power for access points (if even needed), you're still leagues away from the cost and complexity of a full tracked third-rail system. >Sure, it's more flexible. It still doesn't address the claim that this will help make those tunnels cheaper. I'm not sure what you mean. Flexibility is cheaper. Being able to use a tunnel that is 500 feet long at a 10% grade is cheaper than having to build a tunnel that is 1500 feet long at 3% grade. |