The Maintenance Tunnel is made of 2 sections, the hallway variant and the Maintenance Tunnel itself. It is also, currently, the only area where it has different layouts, currently only 2 have been built however more are to come.

The hallway is a door that requires Armory Access Tier 1 to open with an elevator on either side of the door that leads up to the Maintenance Tunnel. Where you'll find yourself in a elevator-like room.

The Maintenance Tunnel is 1 of 5 different layouts of corridors and intersections, this place is quite dangerous to be in as a Human as no doors are provided so SCPs can easily catch up to Humans. A generator room is present some where as well as a second elevator that leads down to Heavy Containment Zone, on the other side of the door. The generator room has 1 SCP-500 out of it's case and a flashlight, making the Maintenance Tunnel a good option to go to if absolutely necessary.