Régiolis

Régiolis
Name	Régiolis
Manufacturer	Alstom
Family	Coradia
Yearservice	2014
Formation	Multiple units
Operator	SNCF
Gauge	Standard gauge
Maxspeed	160 km/h

Régiolis The Régiolis is a family of multiple unit regional trains built by Alstom as part of the Coradia platform for use by SNCF in regional and intercity services across France. Launched during the early 2010s, the series was developed to replace aging rolling stock such as the SNCF Class X 72500, SNCF Class Z 21500, and certain SNCF diesel units on non-electrified lines while competing with projects by Bombardier Transportation and Siemens. The programme involved partnerships with regional authorities including Région Auvergne-Rhône-Alpes, Région Occitanie, Région Nouvelle-Aquitaine, and organisations such as Réseau Ferré de France stakeholders.

Design and development

Alstom's design phase leveraged expertise from the Coradia family and experience with projects such as the Coradia Liner and Coradia Continental to meet requirements set by SNCF Voyageurs and regional councils including Hauts-de-France and Bretagne. Industrial planning involved the Alstom Belfort and Alstom Reichshoffen sites and subcontractors like Bombardier partners and suppliers in the European Union supply chain. The development programme referenced standards from the European Union Agency for Railways and sought interoperability with infrastructure managed by SNCF Réseau and signalling systems including ERTMS and existing KVB installations. Public procurement processes engaged regional governments, the Ministry of Transport (France), and legal frameworks such as provisions from the European Commission on public contracts.

Design objectives emphasized modularity for varied power modes—electric multiple unit (EMU), bi-mode, and diesel multiple unit (DMU)—to provide flexibility across corridors operated by TER networks like TER Nouvelle-Aquitaine, TER Occitanie, and services linking hubs such as Paris Gare de Lyon, Lyon Part-Dieu, and Marseille Saint-Charles. Accessibility and passenger comfort drew on ergonomic research from institutes including INRETS and featured features compliant with regulations influenced by the United Nations Convention on the Rights of Persons with Disabilities as applied by French legislation.

Technical specifications

Régiolis units are built on a modular aluminium body with articulated bogies developed in concert with suppliers such as Faiveley and Knorr-Bremse for braking systems. Traction systems employ inverters and motors derived from technologies used in TGV and AGV programmes, with configurations offering power outputs suitable for maximum speeds up to 160 km/h in standard service. Onboard systems include passenger information equipment compatible with standards from SNCF and provisioning for Wi‑Fi networks, CCTV supplied by companies like Thales or Siemens Mobility, and HVAC units from industrial firms including Trane.

Electrical versions operate under 1.5 kV DC and 25 kV AC overhead catenary compatible with Réseau Ferré de France electrification, while bi-mode variants combine electric traction with diesel engines meeting EU Stage IIIB or later emissions norms and supplied by manufacturers such as MAN or MTU. Bogie design reflects influences from projects like the Alstom Coradia Lint and integrates disc brakes, wheel slide protection from Knorr-Bremse, and active suspension elements inspired by research at IFSTTAR.

Operational history

Entry into service began in the mid-2010s with regional deployment by SNCF on TER networks including TER Provence-Alpes-Côte d'Azur and TER Grand Est. Early operations replaced older stock on corridors linking Bordeaux–Arcachon and interregional links such as Paris–Dijon feeder services. Fleet acceptance involved testing on national test centres like those used for TGV and trials with signalling authorities including SNCF Réseau certification teams and the European Union Agency for Railways processes.

Commercial operations encountered service adjustments coordinated with regional transport authorities and infrastructure managers like Réseau Ferré de France and commercial partners including Keolis for certain regional concessions. Integration with timetable planning was coordinated with national operators such as SNCF Voyageurs and affected long-distance connections at major stations including Gare du Nord and Gare de Lyon.

Variants and modifications

The Régiolis family includes EMU, bi-mode, and DMU variants tailored to regional specifications contracted by different authorities including Région Bretagne and Région Nouvelle-Aquitaine. Custom interior layouts, seating arrangements, and luggage provisions were specified by clients such as Région Occitanie and adapted for services linking urban centres like Lyon and Grenoble. Additional modifications implemented over time include retrofits for ETCS compatibility, improved onboard diagnostics using suppliers like Alstom Digital Services, and emission-reduction upgrades conforming to successive European Union environmental directives.

Experimental adaptations tested features such as battery-assisted traction and hybridisation concepts studied in collaboration with research bodies like CEA and industry consortia including Shift2Rail to extend operation on non-electrified branch lines.

Operators and deployment

Primary operator is SNCF Voyageurs under contract with regional councils such as Région Hauts-de-France, Région Auvergne-Rhône-Alpes, and Région Île-de-France for selected services. Deployment spans regional TER networks across metropolitan France and includes services interfacing with national operators like TGV services at interchange stations, and local transit authorities including municipal bodies in Nantes, Lille, and Bordeaux. Maintenance and overhaul are carried out at Alstom facilities and regional workshops managed by SNCF and contractors including CAF and private maintenance firms.

Incidents and safety record

The Régiolis fleet has experienced a limited number of incidents typical of regional rolling stock, investigated by agencies such as the Bureau d'Enquêtes sur les Accidents de Transport Terrestre and safety oversight from SNCF Réseau and regional authorities. Investigations often involve signalling interactions with systems like KVB or ETCS and mechanical assessments referencing manufacturers including Alstom and component suppliers like Knorr-Bremse. Safety improvements followed recommendations from investigators and regulators, resulting in software updates, maintenance regime adjustments, and operator training coordinated with unions such as SUD-Rail and CGT Transports.

Category:Rolling stock