In TTD rail building can be hectic. Thankfully I have made some basic rail junction tutorials below.
read through them and the rail building tutorial, and you should be set to build like a pro.
Simple Junctions
This is the most simple junction possible. No signals or anything. Prone to crashes though.
Here we have pre-signalled the junction. This is typical of a roro station entrance.
Now we have doubled the route. It is a simple junction for trains going in both directions. PBS signals would be handy though.
This is a T junction. These are great for making passenger branch lines as the trains can go any way.
Medium Stage Junctions
This is a more heavy rail T junction, but is built to only face one way. Good for a single branch line in which the junction faces the terminus.
This is a half cloverleaf junction, and is a T junction built to face both ways. Built for heavy duty lines with several trains.
This Junction is a full cloverleaf junction. It is not a T junction, but a crossroads. Trains can go in all directions. Unfortunately it can meet with jams at higher peak times.
To Cope with the "higher peak times" I PBS signalled the whole junction. Now trains can enter the same block and makes the junction a bit more effective
Hard Stage Junctions
Click on image to enlarge This is a basic 8 way junction. No loops or cloverleafs. Just straight lines.
Trains on the outer tracks must stay left. The center is PBS controlled.