This thesis examines the potential for enhancing and expanding Berlin’s existing train station infrastructure through a case study focused on the U-Bahn station Gleisdreieck. This station, positioned within Berlin’s S-Bahn ring, is poised to require an S-Bahn extension in response to a new north-south transit link. The project presents a design proposal that integrates an S-Bahn station with the current U-Bahn station, and explores opportunities to future-proof these existing structures.

The central challenge addressed is the aging state of Berlin’s train stations, which increasingly fail to meet both present and anticipated needs. Through architectural and infrastructural adaptation, the study seeks to determine how Berlin’s transport hubs can evolve to support future mobility while respecting historical value. This proposal aims to achieve a careful balance between heritage preservation and forward-looking urban functionality, creating a sustainable extension that supports Berlin’s growth and aligns with future demands.