The International Conference on Natural-Infrastructure Connectivity — organised by the #TRANSGREEN project and funded by the Danube Transnational Programme — will gather over 100 scientists, scholars, and engineers from the Danube Region working on the themes of green and grey infrastructure and spatial planning. The event will focus on fostering cooperation between the participants by presenting and discussing ongoing research activities and sharing best practices in order to develop adequate policies throughout borders and sectors for safer and more environmentally-friendly road and rail networks in the mountainous regions of the Danube Basin.