In sister towns urbanisation takes place only in town growth zones around their traditional station, unlike hub towns which also have development along tentacles. Some sister towns do also have a new station at the centre of a new green quarter, but it is unusual.
Where the traditional station is not in the town centre, the two are connected by a mall with bus or PRT and cycle routes.
Many older areas of sister towns lie outside the pedsheds. These areas have experienced little development, but have improved buses or PRT for their local transport. Sister villages have kept their identity and are still partly surrounded by countryside, but many are now one of a cluster of villages incorporated into a new green town, and have benefited from the common facilities of its centre. Residents who chose not to stay and take advantage of the rise in property values that occurred, instead took the financial assistance to which they became entitled and moved elsewhere.