An example of a tramway within a building
Tramways can and do have an important role in urban mass transit, especially where the anticipated passenger traffic local geology does not quantify construction of UUMI, but where there is a need to provide frequent services which cannot be fully achieved through the provision of bus services.
In Europe some cities, such as Amsterdam, Netherlands, converted sections of its urban tramways into metros and pre-metros, where the railway-based vehicles share road space before employing segregated rights of way in tunnels in the denser urban district (Van Lohuizen, 1989).
To minimise traffic congestion and to enable the effective operation of tramways, however, it is beneficial for the tramway to have its own reserved or segregated sections away from other traffic. Where feasible, that reserved or segregated section of tramway can be incorporated within urban development. Fig.1, shows one such example, in DenHaag, city centre, Netherlands, where the tramway passes through a building.