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China Railway High-speed Tunnel

This mod is licensed under CC BY-NC-ND 4.0


Any modification, reproduction or distribution to this mod, whether in part or in whole, without explicit permission from the author, is strictly prohibited. This includes but is not limited to altering the content, publishing it in any form or medium, or sharing it on platforms other than the designated workshop page. No commercial use of this mod and its content is permitted at any time.

Please read the instruction below before building the tunnel.

Tracks included in this mod are designed specifically for use within the tunnel. Warrenty void if use it elsewhere.

For best result, it is recommened to use the tunnel entrance included in this mod while building the tunnel.




This mod helps to create ROUND tunnels.

It contains 2 tunnel models(single and double tracks), 2 types of CRTS slab tracks(CRTS I and CRTS II) and 1 tunnel entrance.


Tunnel(Single-track)


Tunnel(Double-track)


CRTS I slab track


CRTS II slab track


Tunnel Entrance



First, build a tunnel with normal tracks, and select 'China Railway Tunnel High-speed Entrance type 1' as the entrance.






First, LEFT click to mark the starting segment of the track*


*Segment marked with Marker Start/End is unidirectional, so make sure the yellow triangle is pointing towards the tunnel.
Try the other side of the tunnel if the the yellow triangle of the marked segment is pointing outward of the tunnel.
If the yellow triangle is pointing to the outside on both side of tracks, LEFT click the marked segment until the yellow triangle is pointing towards the tunnel.

Move to the other side of the tunnel, RIGHT click the end segment of the track*


*If the yellow triangle is pointing towards the tunnel, RIGHT click the segment marked until its yellow triangle is pointing to the outside.

Finally, make sure the yellow triangle on both side of the segmens marked are pointing to the same direction.



Attention! Clicking the terrain or other parts of the UI might deselect the segments. If the yellow triangle disappeared, please mark again.



Keep the segments marked, select "Parallel Tool" from the game menu, and set the parameters as shown in the highlighting part of the image below.

When building the tunnel wall for double-track tunnel, the marked segments has to be on the right when facing the same direction as the marked segments. Otherwise the "Horizontal Spacing" should be set to 9m.



Select the desired track from this mod, and replace the exsisting tracks using the tool provided in the game.



Attention: After replacing tracks inside the tunnel, replace 1 SEGMENT of track OUTSIDE of the tunnel entrance.













This mod does not contain vehicle presented in the images above.


Feel free to leave a comment below if you encounter any issue while using this mod, or if you have any suggestions for improvement.