I disagree on the train provided the route is built on an already heavy commuter route. Even if they need to rent a car at the other end that's still a huge ne

I disagree on the train provided the route is built on an already heavy commuter route. Even if they need to rent a car at the other end that's still a huge net benefit to reducing the load on the route as it exists now, as well as increasing the overall system efficiency. And putting trains on tracks is easy. You aren't building trains you're building train track routes that can be used by many trains.