A sizable, box-shaped structure known as a tunnel-tube junction station found its main purpose at construction zones situated on planets devoid of atmosphere, like those described in airless environments. These stations remained operational until a functional underground tunnel network could be established. Equipped with a tread-based locomotion system, the station offered mobility and accommodated four deployable tunnel-tubes. Thanks to its integrated self-propulsion mechanism, the station could be maneuvered into the desired location, allowing its tubes to connect with another junction station, a starship, or the entrance of a constructed building. Furthermore, these stations featured viewports and a central control panel. This console managed the propulsion system, steering mechanisms, commo systems, safety and alarm systems, and lighting fixtures. The console also oversaw gravity-control and life support functions. Occasionally, the junction station and its tubes incorporated a hydroponics recycling setup for breathable air, integrated with the site's established hydroponics infrastructure and regulated via the control console.