Overview

This is a 4 Way Turbine Intersection taken from https://imgur.com/a/Hcsc41w, below you will find detailed steps on how to build this intersection. This uses 50 x 50 grid from one side to the other.

Step 1: Lower Terrain

In this screenshot, North-South (N-S) is the underpass and East-West (E-W) is the overpass Lower the terrain by 2 and make a 5x5 hole Extend the 5x5 1 more in each direction You now have a 7x7 with indented corners E-W On the next level up extend out a 2x5 hole Do this on both sides N-S On the next level up extend out a 5x5 hole Do this on both sides Lay two short rail sections

• In this screenshot, North-South (N-S) is the underpass and East-West (E-W) is the overpass
• Lower the terrain by 2 and make a 5x5 hole
• Extend the 5x5 1 more in each direction
  • You now have a 7x7 with indented corners
• E-W
  • On the next level up extend out a 2x5 hole
  • Do this on both sides
• N-S
  • On the next level up extend out a 5x5 hole
  • Do this on both sides
  • Lay two short rail sections

Step 2: Place Rail Ramps

• N-S
  • Starting from the bottom rail section connect the rail to the top ground level
  • Repeat on both sides

Step 3: Place Overpass Bridge

• W-E
  • To add the bridge, start with a rail section on the top ground level
  • Press B to change to Bridge mode
  • Change the Type to Beam bridge
  • When your cursor goes over the gap the first pillar appears the bridge will raise in height
  • Click mouse button to create the first bridge section
  • Move to the other side to create the second bridge section
  • Repeat for the other bridge

Step 4: Lower Terrain

• E-W
  • From the new lower bridge section on the right go E 7 and then lower terrain down 3
  • Level the terrain in the E direction to a 5x5 square
  • Repeat on the W side for the upper bridge section
• N-S
  • From N right rail go N 5 and then lower terrain down 3
  • Level the terrain in the E direction to a 5x5 square
  • Repeat on the S left rail

Step 5: Place Outer Bridge

• W-E
  • On the top right side of the W 5x5 start with a rail section on the top ground level heading towards the existing bridge
  • Press B to change to Bridge mode
  • Change the Type to Beam bridge
  • When it reaches the other side it will place a beam support and a flat bridge will be created when you click
  • Create the bride and then connect the track through to the next bridge
  • At the same time, continue the rail out parallel to the other bridge
• Repeat this process all the way around, it is IMPORTANT that the beam is created on the inside section of the 5x5

Step 6: Lower Terrain

• E
  • On the N side of the bridge on the other side of the rail lower terrain by 3
  • Level terrain in the N direction in a 2x7 rectangle
• Repeat all the way around

• E
  • Continue the hole towards W 2x5, leaving a 2x2 square near the track end
• Repeat all the way around

Step 7: Create Tunnels

• W
  • Starting in the outside 2x7 hole
  • Begin by laying a rail, click when the rail is half into the N side of the wall
  • Press T to change the type to Tunnel
  • Rotate the camera 180° (hold mouse scroll wheel button)
  • When you position the rail in the correct spot, the tunnel will appear
  • Click to create it
  • This creates a 2x3 tunnel
  • Repeat to create a 2x5 tunnel next to it
  • Repeat all the way around

• Repeat to create a 2x5 tunnel next to the 2x3 tunnel

• Repeat all the way around

Step 8: Lower Terrain

• S
  • On the 2x5 tunnel delete the small section of rail at the entrance
  • Level the terrain in 1x4 increments as marked on the screenshot

Step 9: Create Lower Tunnels

• S
  • Place the lay rail connector on the inside of the tunnel
  • Click to start the rail
  • Adjust your camera view so you can see the N E tunnel
  • Connect the rail to tunnel entrance

• Repeat this all the way around

Step 10: Connect Inner Tunnels

• E
  • Place the lay rail connector on the inside of the left tunnel
  • Click to start the rail
  • Connect the rail to the rail section above the S tunnel

• Repeat all the way around

Step 11: Connect Outer Tunnels

• W
  • Add a section of 15m rail to the left tunnel
  • Continue the rail to the S ground level S
  • Place this new section in front of the S bridge
  • Connect the tracks together from the bridge to the new section
  • Also extend the parallel track section
• Repeat all the way around

Step 12: Connect Inner Turns

• The last rail sections to add are the inner turns
• Starting from the S bridge connect rail to the W rail
• Repeat all the way around

Completed Intersection

Here you can see the intersection completed.

Here is after adding signals, using pre-signals before intersections and signals after intersections.