This article seeks to improve the understanding and efficiency of transportation within and between metropolitan areas. Efficient transportation infrastructure and services are essential for achieving sustainable development, fostering economic growth, and minimizing environmental impacts. In metropolitan regions, where urbanization and population growth are concentrated, the significance of transportation efficiency becomes even more critical. To address this issue, the study proposes a methodology that combines graph theory and centrality measures to analyze regional hierarchies and their influence on transportation efficiency. By representing the regional road network, cities, and toll plazas as a graph with attributes linked to quantitative data of urban economies, this approach provides a concise and replicable method for examining network hierarchy in urban economies.