> Still, a circle would have been better because you could have trains going both directions In this case couldn't you just walk across the street and take the

> Still, a circle would have been better because you could have trains going both directions In this case couldn't you just walk across the street and take the opposite direction train? I may be misinterpreting the idea in my mind, but it seems like it could be treated as an extremely long, skinny ellipses (this sentence begs for a math nerd to comment with the correct terms.) You could even have multiple (or 60 each way, oil tycoon style) trains if utilizing tunnels and overhangs for people to 'walk through' the lines of running trains.