Vulnerability Model of a urban centre. Methodology for a quick evaluation of emergency road network vulnerability

The strategic paths, clearly identified in an emergency plan, are a part of the ordinary roads network, that after an seismic event has to be ensured to enable the arrival at the strategic elements, the possibility of ap- proaching each urbanized area of the municipality, and, more in general, a minimum service mobility to the resident population. This paper proposes a quick methodology, subject of a first trial, with proper Survey form, that analyzes a few in- dicators, considered highly significant, and allows the evaluation of critical situations of the various links in which can be broken down the entire emergency road system of the Plan. The methodology is intended to provide an application that, in case of earthquake, allows to focus attention primarily on a few well-defined critical points of the emergency paths system, to determine the final scheme for the event occurred, by replacing any of the links, no longer functional, with others that are already contemplated as alternative in the plan. This analysis is also functional to the scheduling of any preventive actions required to reduce or eliminate the critical problems.

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