This model was inspired by set 79110, (Silver Mine Shootout) from the Lone Ranger theme. LDD file included!
About this creation
This tunnel can let tall objects through, such as the official caboose (set 10014) or even the Maersk double stack container train. (set 10219), with about two plates of clearance between the roof of the top container and the tunnel ceiling.
The middle of the model has modular pins to connect to the identical other half needed to build a complete tunnel. It can also be extended with a middle section, but I don't have one available to download like the rest of the tunnel at this time. (I seem to have lost the file, and the tunnel is pretty cool as it is anyway.)
Proof that this tunnel lets the 10219 container train through with room to spare. (Containers and train car not included in LDD file!)