In my previous blog post I talked about how the Hyper Loop worked, the maglev train works in a very similar manner just in a less efficient way.
As seen above the train actually wraps around the track and 'floats' on the track by using magnets to pull the train up into the air to reduce any friction of the track. There is also a 'guidance' magnet to make sure that the train stays centered on the track and that it won't crash into the sides.
As mentioned in my Hyper Loop blog air resistance can be a huge factor as to how fast these trains can go. Because these trains are not in a sealed tube they have to deal with the problem of air resistance, this is solved by giving the train a very pointy front as to cut through the air more efficiently.
(Personally I think they look a little like a platypus)