The solitaires given by the development plan dis-solve the block structure in "Vögenstraße" in order to convert the building open areas of green space at the "Schröderstraße" in the plan area and a public connection and to enable a visual relationship between the "Augst-Bebel-Straße" to the ramparts.The underpass through a tunnel under the "Schröderstraße" opens into the access area of a newly created space between the two solitaires. Thus the identity of the place is preserved and delivered to a newly created opening function. From the pedestrianized "Vögenstraße" this pedestrian-friendly development space for the structure D2 is barrier-free, so that, in case of fire, the barrier-free Firemen circulation is also guaranteed. All other Firemen set-up areas are located on the public roads.