Barrier-free design pedestrian and cycling tunnel Sonnenberg in the assisted area “ERDF — Chemnitz Downtown” — 2. BA: Replacement new construction of the supporting wall on Dresdner Str. with refurbishment of the stairway system including the installation of the ramp traffic area with the aim of upgrading the tunnel, which had previously been classified as a fear room, in a design and functional way in order to ensure a needs-oriented barrier-free connection for pedestrian and cycling traffic to the Sonnenberg (action field Poverty Reduction — IP 9b)