Grenoble’s Ambitious RER Project: A Glimpse into France’s Regional Rail Revolution
The long-awaited RER métropolitain grenoblois, a project often described as a “serpent de mer” (sea serpent) due to its repeated delays, is gaining momentum. This ambitious undertaking, estimated to cost €1.4 billion, aims to transform transportation in the Grenoble area, and beyond. The project involves collaboration between the State, SNCF Réseau, the Auvergne-Rhône-Alpes Region, the Isère Department, Grenoble Alpes Métropole, Le Pays Voironnais, Le Grésivaudan, and the Syndicat mixte des mobilités de l’aire grenobloise (Smmag).
Seeking National Recognition: The SERM Status
A crucial step forward has been the official request for the project to be designated a Service express régional métropolitain (SERM). Sylvain Laval, Vice-President of Grenoble Alpes Métropole and President of Smmag, emphasized that achieving SERM status is “an indispensable step” to access national funding, particularly from the State. Grenoble is aiming to be among the first cities in France to secure this designation, positioning itself at the forefront of regional rail development.
The Vision: An Integrated Transport Network
The RER project isn’t simply about adding more trains. It envisions a comprehensive and integrated transport network. Coralie Bourdelain, Vice-President for Mobility at Le Grésivaudan, described the goal as creating “a complete and integrated transport offer with a railway base, supplemented by regional buses, park-and-ride facilities, bicycle networks, and interchange hubs.” Operational costs are projected to reach €85 million annually.
Funding the Future: A €967 Million Challenge
While initial investments have been made – Grenoble Alpes Métropole has already contributed €16 million, including funds for work on the Sillon Alpin Sud and the Alps line – a significant funding gap remains. Approximately €967 million still needs to be secured. Potential funding sources being explored include renegotiating highway concessions, carbon quotas, adjustments to the mobility contribution, state-regional planning contracts, and the implementation of local taxes.
Progress on the Ground: Investments and Timelines
Significant progress is already underway. Le Grésivaudan has invested over €8.5 million in the Brignoud station, preparing for RER-style service between Brignoud and Grenoble by 2028. Initial improvements to service levels are planned for 2028, with four trains per hour running between Grenoble and Brignoud during peak times. Branches serving Voironnais, Saint-Marcellin, and the Grésivaudan will see increased service during off-peak hours.
Looking Ahead: Phased Development to 2050
The project is structured around a phased development plan:
- 2028-2029: Increased frequency on the Grenoble–Brignoud line and enhanced off-peak service on other branches.
- 2033: Half-hourly service during off-peak hours, and increased frequency on the Grenoble–Lyon line.
- 2038: Additional trains added during peak hours between Saint-André-le-Gaz and Grenoble.
- Post-2050: Long-term upgrades, including strengthening the Alps lines and quadrupling the track between Grenoble and Voreppe.
Did you know?
The creation of SERMs is a recent development, formalized by a law passed on December 27, 2023, designed to accelerate coordinated transport development in major urban areas.
FAQ: Your Questions Answered
Q: What is a SERM?
A: A Service express régional métropolitain (SERM) is a new designation aimed at accelerating the development of coordinated public transport in large urban areas.
Q: How much will the RER project cost?
A: The project is currently estimated to cost €1.4 billion.
Q: When is the first phase of the RER expected to be operational?
A: The first phase, connecting Grenoble and Brignoud, is targeted for completion by 2028.
Pro Tip
Stay updated on the project’s progress through the Smmag website (https://smmag.fr/investir-pour-lavenir/rer-ferroviaire/) and the Grenoble Alpes Métropole website.
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