Digital transition is deeply changing the AECOO (Architecture, Engineering, Construction and Owner Operators) sector. This transformation, based mainly on Building Information Modelling (BIM) and Geographic Information Systems (GIS), is a key element in facing new challenges linked to climate and urban changes, mitigating environmental impacts and promoting energy efficiency. In the infrastructure domain, a main criticality is to reduce greenhouse gas emissions, improving sustainable mobility. In this perspective, a disused railway may offer the opportunity to give back to the community a path unique in its kind, transforming it into a corridor for soft mobility. This study aims to present a digitalisation workflow to identify and model disused railways civil engineering assets: starting from a literature overview about the use of the IFC (Industry Foundation Classes) open-standard format for civil engineering assets, a case study of a viaduct from a disused railway is presented testing the potentiality of IFC as a bridging element for BIM/GIS interoperability. The aim is the creation of an integrated system that enhances data accuracy, consistency, and accessibility throughout the project life cycle.