https://twitter.com/bioreconstruct/status/898950594781642752
If you look at Bioreconstructs photos here you can see they have space to store 3 trains, plus 1 more in the station. That fits with the blocks they have set up as well. Block one - Station; Block two - Linear launch 1; Block 3 - Linear launch 2; Block 4 - holding outside of the station. I believe others are spot on here in that what we are seeing is only a small portion of the train. There could also be an unload prior to the loading, however, the station length does not suggest that.
edit: For four trains there should be an additional block, not sure where that is looking at the photos. It could only be a three train system.