http://gyazo.com/4d2408472370f81037d87aa0ea872e3d if it appears as a sad smiley.
The line on the right goes from Z 500 to Z 0, which is finished. Unfortunately X=0 Z=0 is equal to the center of an ocean, so forget that, but yet, I finished the station and railwork that go to there, and they work just fine.
The one on the left will have 2 connections (The one on the right will have a second connection, too).
One that will go from 500 to 1000, and one from 1000 to 1500.
After that I may update this subway (This is exactly near the spawn) to X directions too. Railroads only go Z directions.
Not because of a script, they would go X directions just fine. But I managed to position the subway that way.
Poll