Pre-CR Tunnel

Smooth gray mottled artificial stone square tunnel with blue emergency wall lights. Rough terrain vehicles can pass through, with rubble openings from construction activities.

The Pre-CR Tunnel is a pre-Construction-Recertification access corridor on a contested planet, featuring smooth gray mottled artificial stone and blue emergency lighting that allows rough-terrain vehicles to navigate its length. In *System Collapse*, it serves as a critical artery for the protagonists' operations, with rubble openings from old construction activities providing both cover and complications during tense maneuvers against corporate forces. Though it appears only in the seventh book, the tunnel embodies the series' recurring theme of repurposed colonial infrastructure—remnants of humanity's expansion that Murderbot and its allies must navigate amid political intrigue and combat. Its relative obscurity in earlier installments underscores how the series gradually zooms in on specific planetary features as stakes escalate from corporate espionage to full planetary liberation.