## 4 Results and Discussion
These categories are significantly extended along the E60 sector between Ploiesti and Brasov, Cluj-Napoca to Oradea, and along the E81 sector between Pitesti-Caciulata and Balota-Boita. The spatial analysis results indicate that the E85 sector from Ramnicu Sarat to Bacau and the E70 sector Orsova-Caransebes-Lugoj are classified within the medium-high to very high impact categories. \begin{table}
\begin{tabular}{l c c c c c c} \hline \hline \multicolumn{1}{c}{\multirow{2}{*}{**Severity**}} & **Patterns of** & **Weather** & **Road** & **Traffic Signal** & \multirow{2}{*}{**Weight**} \\  & **Occurrence** & **Conditions** & **Restrictions** & & **Systems** & \\ \hline Severity & 1 & 3 & 5 & 7 & 9 & 0.557 \\ \hline Patterns of occurrence & 1/3 & 1 & 2 & 5 & 6 & 0.207 \\ \hline Weather conditions & 1/5 & 1/2 & 1 & 3 & 7 & 0.132 \\ \hline Road restrictions & 1/7 & 1/5 & 1/3 & 1 & 2 & 0.066 \\ \hline Traffic signal systems & 1/9 & 1/6 & 1/7 & 1/2 & 1 & 0.048 \\ \hline \multicolumn{1}{c}{Lambda = 5309; CI = 0.077; CR = 0.068; Consistence = 7\%.} \\ \end{tabular}
\end{table} 
Table 8: AHP score for the cumulation of the main factors leading to car traffic incidents. Due to heavy traffic and their role as connector roads between major traffic arteries, certain sections of national roads also fall into the high territorial vulnerability categories. Notably, the DN15C sector from Buhusi to Targu Neamt is highlighted. This road serves as a key access route from the cities of Piatra Neamt and Targu Neamt to the E85 European road, thereby generating high traffic volumes. Additionally, the DN11 sector between Brasov and Targu Secuiesc is significant, as it provides a crucial link between southern Transylvania and Moldova, further underlining the importance of these roads in terms of territorial impact and vulnerability. The territorial analysis across Romania emphasizes the significance of motorways in determining vulnerability and risk related to traffic incidents. Notably, the positive effects of motorways such as the A3 Bucharest-Ploiesti, A1 Bucharest-Pitesti, and A2 Bucharest-Constanta are evident. These motorways handle a substantial volume of traffic moving from the Romanian capital towards the East, North, and South-East, thus improving travel conditions and reducing road incidents in their areas of influence. A similar beneficial impact is observed in the Transylvania region's motorway sectors, including the A1 motorway sectors Boita-Holdea and Margina, the Western part of the country, A10 Sebes-Campia Turzii, and A3 Targu Mures-Chetani and Campia Turzii-Nadaselu. The spatial arrangement of traffic accident locations indicates a lower density of accidents near motorways, suggesting direct validation of the spatial analysis model in terms of both the methodology developed for this research and the accuracy of the AHP influence matrices for individual factors and their integration into the comprehensive spatial analysis model. Further development of large road infrastructure and expansion of the motorway network in Romania could alter the current model's configuration. This would likely lead to reduced traffic congestion and changes in the territorial vulnerability pattern,  
Figure 7: Spatial distribution of cumulative impact based on the aggregation of key factors. including a decrease in large vulnerability classes and spatial reconfiguration. For instance, ongoing work on the A3 motorway, particularly its extension on the Ploiesti-Brasov sector, is expected to reduce traffic incidents on the E60 European road in this sector, currently classified in the high to very high impact category. Likewise, continued construction of the A1 motorway, connecting Boita and Pitesti, could reclassify the E81 Pitesti-Caciulata and Balota-Boita sector into a lower cumulative impact class. The planned network of motorways in Romania, aimed at extending westward and connecting to the European network, includes the A3 motorway extension to the Romanian border.