> In other words, a single vehicle breaking down can take down the entire transit system. Eh. It's the same way for most train tracks around the world, single

> In other words, a single vehicle breaking down can take down the entire transit system. Eh. It's the same way for most train tracks around the world, single track and double tracks without frequent crossing. You could still push/pull them along with the next train, in case they have a single point of failure. Other points still stand, but with that quite ambitious completion date well see sooner than later