The infrastructure manager: ensuring security, interoperability, and continuity of public service.
RATP Infrastructures business unit (BU) is responsible for managing the metro and RER infrastructures of the existing network in the Île-de-France region, as well as those of the Grand Paris Express network. In this context, its mission is to ensure the maintenance of security, interoperability, and continuity of public service, and to manage the control, regulation, and security systems of the railway networks in Île-de-France. Additionally, it must ensure equal access for different operators to the network.
The infrastructures include the tracks, stations, tunnels, signaling, train movement systems, and electrical power distribution. In this regard, the RATP Group carries out maintenance work on these installations as well as renovation, modernization, and extension work on the existing network, as part of the Grand Paris Express project.
The areas of expertise :
Engineering
Project management and integration
Electrical installations and systems
Transport structures and infrastructures
Railway control systems
Maintenance
Transport operation
Equipment, stations, and civil engineering works
Transformation and distribution of electrical energy
Track
Excellence in infrastructure security
The teams at RATP Infrastructures work every day to ensure service continuity and railway safety, particularly by managing:
of metro lines
of RER lines
of cables distributing energy
Our missions
Manage RATP assets
Manage RATP assets, which constitute the metro and RER network infrastructure, while managing the technical aspects of the Grand Paris (Greater Paris) network, in line with applicable regulatory and contractual frameworks. This part of the mission is carried out by proposing and implementing the policy to develop and maintain assets and major categories of equipment in the business unit’s field
Design and implement projects
Design and implement projects to create, upgrade and renew infrastructure assets.
Guarantee the compatibility of the business unit’s operations with the regulatory framework
Guarantee the compatibility of the entity’s operations with the regulatory framework, and support the phased opening to competition of RATP Infrastructures-managed networks.
Regulated Activities
The reference document of the technical manager of the Grand Paris Public Transport Network introduces the responsibilities of the Infrastructure Manager (IM) and the other stakeholders of this network (I), describes the scope of the IM’s technical management responsibilities (II), and details the planning and implementation process as well as the monitoring arrangements for the IM’s interventions (III). This document is published annually in accordance with the provisions of Articles L2131-4 and L2142-19 of the Transport Code.
*Document published online on 30 June 2025