Assisting cities with their major mobility projects
Design, implementation, entry into service, operation, maintenance, modernization…
RATP Dev works on every link in the value chain of major mobility projects.
We work to make networks more reliable, designed for the passengers,
and jointly constructed with cities and their stakeholders.
Proficiency with major public transit projects
Major public transit infrastructure projects present a host of challenges: staying on schedule and budget, ensuring safety, service continuity during the work, coordination of a multitude of players, and close collaboration with local authorities.
With 120 years of history designing, building, operating, and maintaining multimodal public transit networks, we work on every link in the value chain. This integrated approach ensures the technical consistency of projects, their sustainability, and long-term service quality.
Expertise that starts upstream
We bring our expertise to bear right from the design phase. Our knowledge of operating and maintenance guides technical choices and safety requirements.
That makes it possible to plan ahead for the future operation of the network and to prepare a reliable entry into service, designed with the passengers’ needs in mind.
Benchmark achievements
On the ground, we work on all types of projects, from creating, extending, or modernizing networks: line automation, transformation of existing infrastructure, converting depots as part of the energy transition, working on sites requiring service continuity…
Each project mobilizes our teams, engineers and operational staff, capable of understanding and adapting to all local ecosystems.
120
years of expertise on complex projects
30+
entries into service of new or extended lines over the past ten years
1,200
engineers within the Group
Our News
Discover all our latest news from around the world
Tramway
Quebec, Canada
RATP Dev Canada selected as the early operator for the TramCité project in Quebec City
06/12/2025
CDPQ Infra has selected RATP Dev Canada as the early operator for the TramCité project in Quebec City.
Metro & automated metro
Riyad, Saudi Arabia
Riyadh’s Metro Operational Launch in Saudi Arabia RATP Dev Ensures Seamless Service on the Blue line (Line 1)
12/03/2025
The Royal Commission for Riyadh City (RCRC) has launched operations on three of the network’s six lines. Spanning 176 kilometers and 85 stations, this metro network serves as the backbone of the city’s public transport system.
Metro & automated metro
Paris, France
Villejuif-Gustave Roussy Station: A Major Milestone For the Future Greater Paris Metro Network
01/18/2025
RATP Dev is delighted to announce the inauguration of Villejuif-Gustave Roussy station, a significant milestone in the development of the Paris metro network, which will expand with four additional lines by 2031.