Interactive Localisation System for Urban Planning Issues - Efficient Decision Support Systems: Practice and Challenges from Current to Future - page 467

This operational choice in the ULISSE GUI was made in order to speed up all the project
graph initialization: ULISSE users are thus free from a mandatory use of the toolbar to
switch between arc and node input modes.
Once all the graph data are entered, the network is ready to be simulated and analyzed.
Anyway, it is always possible to interact with the scenario by changing any of the graph
parameters or by adding or removing nodes and arcs at any time.
Fig. 4. Net building
5. Result and applications
ULISSE allows urban operators to retrieve a significant number of results, such as the
influence area of each service site, the degree of utilization of each service, the induced
traffic flow increment on each road, the total cost of any given service location.
Moreover, other relevant information can be obtained: the minimum path matrix for all the
nodes of the network; the distribution of traffic due to a given origin-destination matrix.
These are typical results of an accessibility model, and ULISSE permits also to face many
other urban subjects such as environmental sustainability of settled scenarios, minimum
level of efficiency of public mobility services, localisation of emergency services.
Applications of the system given in this paper concern the city of Pavia, in which interesting
problems regard the reuse of ex-industrial areas and mobility in the centre of the city -
related to its specific morphology and to the distribution of services, which is concentrated
in this part of the town.
With reference to official traffic data (Urban Mobility Plan, Municipality of Pavia, 2008), in
order to face different matters, the examples pertain two mobility nets: the first regarding
the whole city (with 90 nodes), the latter focused on the centre (62 nodes).
5.1 Environmental impact check
The aim of this application is to verify the pollution effects due to a settled distribution of
services located in two ex-industrial areas, now apt to an urban renewal: National Railway
goods yard (node 23) and SNIA Viscosa (node 82) as shown in Figure 5.