The European railway industry faces great challenges in need for increased network capacity. Ageing infrastructure assets require efficient and sustainable interventions to maintain and improve current levels of performance. To meet these demands and increase the operational performance of the railway infrastructure assets, innovation is needed to enable a step-change in reliability, availability, maintainability and safety (RAMS) and also to optimise asset capital and LCC. The IN2TRACK3 proposal addresses the topic of “Research into optimised and future railway Infrastructure” of the 2020 Horizon 2020 SHIFT2RIL call. The project is a continuation of IN2TRACK and IN2TRACK2 and aims to further develop and demonstrate research results and innovations developed. IN2TRACK3 will develop physical as well as digital technology and methodology demonstrators for the Track, Switches & Crossings and Bridge & Tunnel assets and the project is aligned to the SHIFT2RAIL overall aims. The project structure is designed around three technical sub-projects aiming at both improving the operational performance of existing infrastructure assets and providing radical new system solutions delivering a step-change in performance, improving methods and repair techniques, improve quality, reduce costs and extend the service life of assets and structures. The project is led by Trafikverket, the Swedish Transport Administration Agency, the consortium consists of 27 expert partners originating from 11 European countries and the partners involved are infrastructure managers, research partners, technology developers and industry partners. IN2TRACK3 will further develop and demonstrate a number of innovative solutions based upon the two previous projects and the work will build upon already ongoing mutually beneficial collaboration, established communication paths and a considerable amount of mutual trust built upon years of collaboration in international project environments.