UPGRADE is an MSCA Staff Exchanges project focused on developing new technologies and methodologies to enhance the resilience and sustainability of long linear infrastructures (such as roads, railways, pipelines and flood protection structures) exposed to geohazards and climate‑change‑driven deterioration. The consortium integrates geosciences, civil engineering, data science and IoT technologies to observe, map and predict the degradation of infrastructures over time, combining Big Earth Observation, advanced geotechnical monitoring, distributed optical fibre sensing, and multi‑scale numerical modelling. A core element of the project is the production of high‑resolution geohazard maps, using SAR, InSAR, drone imagery and deep learning techniques to support the monitoring of landslides, subsidence and structural deterioration. Through staff exchanges, workshops and network schools, UPGRADE builds an international, interdisciplinary training environment connecting academia and industry. The ultimate goal is to develop predictive tools and decision‑support systems for more efficient maintenance strategies and to contribute to a safer and more sustainable future for critical infrastructures.