Slovenian transport engineering firm specializing in railway infrastructure, digital signalling systems, and train automation within the Shift2Rail ecosystem.
Prometni Institut Ljubljana (Traffic Institute Ljubljana) is a Slovenian private transport engineering and consultancy firm specializing in railway infrastructure, signalling systems, and intelligent transport solutions. They contribute technical expertise to large European rail research programmes, particularly within the Shift2Rail Joint Undertaking, covering everything from track and station infrastructure to advanced train automation and communication systems. More recently, they have expanded into critical infrastructure cybersecurity and resilience, applying their transport domain knowledge to security challenges.
Core contributor to X2Rail-4 (automatic train operation, moving block signalling) and X2Rail-5 (adaptable communication, fail-safe positioning), plus CONNECTA-3 on train control and management systems.
Contributed to IN2TRACK2 (tracks, switches, crossings, bridges and tunnels), IN2STEMPO (stations, energy metering, power supply), and NeTIRail-INFRA (interoperable railway needs).
Participated in SocialCar, developing an open social transport network integrating carpooling into urban mobility — their largest directly-funded project at EUR 157,011.
X2Rail-5 addressed cybersecurity in rail signalling, while PRECINCT (2021-2023) focused on cascading cyberphysical threats to critical infrastructure using serious games and digital twins.
Recent projects (X2Rail-4, X2Rail-5) explicitly focused on demonstrators, prototypes, and integrated technology demonstrators — indicating hands-on implementation capability beyond desk research.
In the early period (2015–2018), PI focused on broad railway infrastructure topics — interoperable rail networks, station design, energy metering, and urban mobility integration including carpooling. From 2019 onward, their work shifted decisively toward advanced digital railway systems: automatic train operation, moving block signalling, cybersecurity, fail-safe positioning, and building integrated technology demonstrators. This evolution mirrors the Shift2Rail programme's own progression from foundational infrastructure research to deployment-ready digital rail solutions.
PI is moving from traditional rail infrastructure consulting toward digital railway systems and critical infrastructure cybersecurity — positioning them at the intersection of transport digitalization and security.
PI operates overwhelmingly as a third-party contributor (6 of 8 projects), meaning they are typically subcontracted by consortium partners for specific technical expertise rather than joining as full participants. This suggests they offer deep specialist knowledge that larger partners bring in for defined work packages. Despite this third-party role, they have worked within very large consortia (172 unique partners across 25 countries), indicating they are well-connected and trusted within the European rail research ecosystem.
PI has collaborated with 172 unique partners across 25 countries, almost entirely through the Shift2Rail ecosystem. This gives them an extensive network within the European railway research and industry community, though their connections are concentrated in the transport sector.
PI occupies a distinctive niche as a Slovenian transport institute that bridges traditional rail infrastructure engineering with emerging digital railway technologies. Their consistent involvement across multiple Shift2Rail work streams — from tracks and stations to signalling, automation, and cybersecurity — gives them a rare cross-cutting view of the entire rail system. For consortium builders, they offer practical rail domain expertise from a smaller EU member state, which can strengthen geographic diversity while providing genuine technical depth.
