In the instance of Fig.1, the development of a tenement building required the provision of access to the Subway station. During the modernisation of the Subway, in the 1970s, new ticket hall facilities were provided, with access provided through a passage from the main road through within the building.
Strathclyde Partnership for Transport (SPT), owner/maintainer of the Glasgow Subway, retain ownership of the airspace for the passageway, within the tenement block, but the building structure and apartments are owned/leased by multiple urban stakeholders.
Where proposals for urban management of the tenement building (window cleaning, repair to brick work etc.) occur, the safe continued presence and operation of the interfaces between SPT and the tenement building, would be required. Moreover, the safe use of the station and the public highway, by Subway, pedestrians, and highway, users, as urban stakeholders, would also be required, during the works.
Proposals for, design, undertaking, and management of the works of urban management would therefore have to be undertaken in such a way as to ensure the safe continued presence and use of the collective urban environment. This would be achieved by a shared comprehension of the occurrences of the presence, property, and protection interfaces, and how, when, where, and why they occur, between the interfacing infrastructure stakeholders. This can only be achieved through the analysis of the occurrence of the interfaces, gathering of key evidence-based data, and effective sharing of that data, between the stakeholders.