The Relationship Between Relief and Transport Infrastructure—Case Study: Rucăr–Bran Corridor

The Rucăr–Bran Corridor, a critical transit route in the Carpathian Arc, has been the subject of interdisciplinary research in the fields of geology and physical and human geography. This paper aims to design a safe, efficient, and sustainable high-speed expressway that will improve regional connectivity while respecting the natural, social, and economic constraints of the area. Based on bibliographic sources and using Geographic Information Systems, this study integrates geomorphological, lithological, protected area, and infrastructure data to identify the most suitable route. The methodology includes data collection, multi-criteria analysis, and environmental impact assessment. The land suitability map resulting from the multi-criteria analysis using the specialized QGIS software led to the routing of a 41.7 km expressway connecting the two extreme localities of the area: Rucăr and Bran. This study demonstrates the value of integrated geomorphological analysis in infrastructure planning, offering a model for the development of economically viable express roads in challenging geomorphological terrain. The proposed route enhances regional socio-economic integration by improving access to isolated areas, promoting tourism, and reducing travel times, aligning with national and European transport strategies.