This document presents a new methodology for assessing the vulnerability of road networks using GIS applications. It describes calculating a vulnerability index based on road design characteristics and identifying critical links. The methodology was applied to a road network in Ogliastra, Italy. Maps showed the most vulnerable central links that are on multiple shortest paths and critical for rescue services. Considering population in the exposure index showed more vulnerable municipalities in more populated areas. The methodology effectively evaluates vulnerability in low traffic, low population density areas and can help prioritize road improvements and emergency management.