I am a fan of subways. Course they only make sense in the largest cities because of the huge cost of constructing them. However if the cost were to drop drama

I am a fan of subways. Course they only make sense in the largest cities because of the huge cost of constructing them. However if the cost were to drop dramatically they would make sense in smaller cities as well. The only one working on dramatically lowering that cost is the Boring company. Where I disagree with them is the use of Tesla's in the tunnels. It would be far cheaper to have rail cars powered by electricity. A lot of the old systems have live power in a center rail. This causes problems if someone is pushed or falls onto the track. I haven't seen it done anywhere but think it makes sense to have an overhead wire the car attaches to similar to how street cars operate.