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Modelling, observation and control of realistic urban road networks of significant size may be subject to the `curse' of dimensionality. On the other hand, the `nature' of the physical system introduces the necessity of its unified treatment, for capturing the interactions and the spatial connectivity of the complete system. In order to facilitate the handling of such complex traffic systems, an approach could be the optimal partitioning of the complete network in sub-regions/networks based on one-or more-criteria. The resulted sub-networks then can be processed more easily (e.g. utilizing tactics of parallel processing), increasing computational performance. Several methods are available and can be applied for partitioning graph/networks, though road networks exhibit particularities that pose constraints in applying standard mesh/graph partitioning technics. One of the most important features stands for the fact that road …