3 Track Tunnels? Help?

[RuvanJ]

I have looked quite a bit around for assets on the DLS, I haven't really found anything. As for what its for, I am attempting to build a route that may include a 3 track tunnel. As for the route I am building. I am sorta attempting to build this route from this video:

As the tunnels are a pretty big part of it I would like to find such a tunnel, and if possible, a tunnel portal that looks somewhat similar to the video? It would be much appreciated if one was to point me in the right direction : )

 

[Brummel]

No comment!

 

[RuvanJ]

No comment? Really ;-; Could someone please provide actual valuable input xD

 

[cascaderailroad]

there is a 4 track, and box
SEPTA Tunnel

there is also a big concrete multitrack tunnel for under buildings such as city stations
Tunnel Concrete
Westwood Tunnel
(there is another multitrack wide one with no columns)