Interactive Localisation System for Urban Planning Issues - Efficient Decision Support Systems: Practice and Challenges from Current to Future - page 471

5.3 Emergency services localization
To obtain the best location for emergency services, such as ambulance basis, the problem is
minimizing the access time from each starting point to every possible destination.
Compared with the previous nets, it means to change each node from client to service and
vice versa. Because of the considered model (electrical analogy), it is possible to consider the
net as perfectly symmetrical; in traffic meaning, authors have to consider only existing
double sense streets, with similar characteristics for both directions. This simplification is
perfectly plausible considering the usual pace of emergency means (acoustic and visual
signals ease streets vacation).
Fig. 9. One single emergency base
Fig. 10. Two emergency basis