If I would build a railway, I would make the trains slow and steady. If you have fast moving trains then you can have fewer trains because they need space for safety. I would still use levitation trains because maintenance and friction is reduced so the costs would be low.
I would also make the trains thinner so more lines could be added for extra redundancy.
You see in my world, levitation trains are slow and steady and easy to maintain. Less wear and tear.