A primary characteristic of an urban IoT infrastructure, hence,
is its capability of integrating different technologies with the
existing communication infrastructures in order to support a
progressive evolution of the IoT, with the interconnection of
other devices and the realization of novel functionalities and
services. Another fundamental aspect is the necessity to make
(part of) the data collected by the urban IoT easily accessible
by authorities and citizens, to increase the responsiveness of
authorities to city problems, and to promote the awareness and
the participation of citizens in public matters [9].