{"id":343,"date":"2025-09-08T23:51:04","date_gmt":"2025-09-08T23:51:04","guid":{"rendered":"https:\/\/infos-media-nantes.fr\/?p=343"},"modified":"2026-10-03T10:08:34","modified_gmt":"2026-10-03T10:08:34","slug":"rer-metropolitain-nantes","status":"publish","type":"post","link":"https:\/\/infos-media-nantes.fr\/rer-metropolitain-nantes\/","title":{"rendered":"SERM Nantes\u2013Saint-Nazaire : o\u00f9 en est le projet apr\u00e8s le vote du 2 octobre ?"},"content":{"rendered":"
\n

Le Service express r\u00e9gional m\u00e9tropolitain Nantes\u2013Saint-Nazaire a franchi une nouvelle \u00e9tape le 2 octobre 2026.<\/strong> Le conseil de Nantes M\u00e9tropole a approuv\u00e9 deux \u00e9tudes ferroviaires destin\u00e9es \u00e0 pr\u00e9parer une augmentation durable des fr\u00e9quences autour de Nantes. Le projet, souvent r\u00e9sum\u00e9 comme un futur \u00ab RER m\u00e9tropolitain \u00bb, reste toutefois plus large : il doit associer trains, cars express, covoiturage, v\u00e9lo et p\u00f4les d\u2019\u00e9changes.<\/p>\n

Deux \u00e9tudes ferroviaires d\u00e9sormais approuv\u00e9es<\/h2>\n

La premi\u00e8re porte sur la modernisation des postes de signalisation de Nantes-Blottereau, Cou\u00ebron, Sainte-Luce-sur-Loire et Vertou<\/strong>. Cette op\u00e9ration, chiffr\u00e9e \u00e0 45,56 millions d\u2019euros<\/strong>, doit augmenter la capacit\u00e9 du r\u00e9seau, notamment sur l\u2019axe Nantes\u2013Angers\u2013Sabl\u00e9. Nantes M\u00e9tropole pr\u00e9voit d\u2019y contribuer \u00e0 hauteur de 2,9 millions d\u2019euros.<\/p>\n

La seconde \u00e9tude concerne la ligne Nantes\u2013Sainte-Pazanne\u2013Pornic \/ Saint-Gilles-Croix-de-Vie. Elle doit pr\u00e9parer un service plus cadenc\u00e9, avec un objectif d\u2019un train toutes les 30 minutes entre Nantes et Sainte-Pazanne<\/strong>, puis un train par heure vers Pornic et un autre vers Saint-Gilles-Croix-de-Vie.<\/p>\n

Des travaux envisag\u00e9s entre 2031 et 2033 sur l\u2019axe du Pays de Retz<\/h2>\n

Quatre ann\u00e9es d\u2019\u00e9tudes sont pr\u00e9vues pour la modernisation de cet axe, pour un montant de 7,5 millions d\u2019euros. Nantes M\u00e9tropole annonce une participation de 750 000 euros.<\/p>\n

\u00c0 ce stade, les travaux sont envisag\u00e9s entre mi-2031 et fin 2033<\/strong>. Ce calendrier reste donc un horizon de projet et non une date d\u2019ouverture d\u00e9finitive du futur SERM dans son ensemble.<\/p>\n

Le SERM doit encore obtenir son statut officiel<\/h2>\n

Le projet Nantes\u2013Saint-Nazaire a \u00e9t\u00e9 labellis\u00e9 par l\u2019\u00c9tat en juin 2024. Une \u00e9tude de pr\u00e9figuration conduite par l\u2019Auran s\u2019est achev\u00e9e en septembre 2026. Elle doit maintenant \u00eatre consolid\u00e9e avec la Soci\u00e9t\u00e9 des grands projets et la SNCF.<\/p>\n

Cette \u00e9tape doit pr\u00e9ciser l\u2019offre de transports, la gouvernance, le financement et les besoins d\u2019am\u00e9nagement. L\u2019objectif est ensuite d\u2019obtenir le statut officiel de Service express r\u00e9gional m\u00e9tropolitain aupr\u00e8s du minist\u00e8re des Transports.<\/p>\n

Des trains toutes les 30 minutes aux heures de pointe<\/h2>\n

\u00c0 l\u2019\u00e9chelle du bassin Nantes\u2013Saint-Nazaire, la cible affich\u00e9e reste un train toutes les 30 minutes en heures de pointe sur les principales branches, puis un train par heure en heures creuses, \u00e0 l\u2019horizon 2030-2035.<\/p>\n

Le ferroviaire ne constitue toutefois qu\u2019une partie du dispositif. Des cars express pouvant atteindre une fr\u00e9quence de vingt minutes aux heures de pointe, des lignes de covoiturage et des liaisons cyclables doivent compl\u00e9ter le r\u00e9seau.<\/p>\n

Pourquoi le projet d\u00e9passe le seul axe Nantes\u2013Saint-Nazaire<\/h2>\n

Le SERM doit organiser les d\u00e9placements \u00e0 l\u2019\u00e9chelle d\u2019un vaste bassin de vie. Il concerne donc aussi les liaisons vers le Pays de Retz, le pays d\u2019Ancenis, les territoires au nord de Nantes et les connexions avec les r\u00e9seaux urbains.<\/p>\n

Pour les habitants, l\u2019enjeu est de pouvoir combiner plus facilement plusieurs modes de transport : train ou car express pour le trajet principal, puis tramway, bus, v\u00e9lo ou covoiturage pour les derniers kilom\u00e8tres.<\/p>\n

IMN d\u00e9taille les deux \u00e9tudes approuv\u00e9es le 2 octobre et leurs cons\u00e9quences pour le futur SERM Nantes\u2013Saint-Nazaire<\/u><\/strong><\/a>.<\/p>\n

Consulter la pr\u00e9sentation officielle du SERM publi\u00e9e par Nantes M\u00e9tropole<\/u><\/strong><\/a>.<\/p>\n

Source : Nantes M\u00e9tropole, conseil m\u00e9tropolitain du 2 octobre 2026. Article mis \u00e0 jour le 3 octobre 2026.<\/small><\/p>\n<\/article>\n","protected":false},"excerpt":{"rendered":"

Apr\u00e8s le vote du 2 octobre, le SERM Nantes\u2013Saint-Nazaire avance avec deux \u00e9tudes ferroviaires. Fr\u00e9quences, calendrier et statut officiel : le point.<\/p>\n","protected":false},"author":1,"featured_media":344,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"content-type":"","footnotes":""},"categories":[22],"tags":[7,90,42,175,8809,8808,89,8794],"class_list":["post-343","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-actualites-nantes","tag-loire-atlantique","tag-mobilite","tag-nantes-saint-nazaire","tag-nantes-metropole","tag-rer-metropolitain","tag-serm-nantes","tag-sncf","tag-ter"],"acf":[],"yoast_head":"\nSERM Nantes\u2013Saint-Nazaire : o\u00f9 en est le projet apr\u00e8s le vote du 2 octobre ? - Infos M\u00e9dia Nantes, infos locales, \u00e9v\u00e9nements et actualit\u00e9 utiles \u00e0 Nantes et ses alentours<\/title>\n<meta name=\"description\" content=\"Apr\u00e8s le vote du 2 octobre, o\u00f9 en est le SERM Nantes\u2013Saint-Nazaire ? \u00c9tudes, fr\u00e9quences vis\u00e9es, calendrier 2031-2033 et statut officiel.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/infos-media-nantes.fr\/rer-metropolitain-nantes\/\" \/>\n<meta property=\"og:locale\" content=\"fr_FR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"SERM Nantes\u2013Saint-Nazaire : o\u00f9 en est le projet apr\u00e8s le vote du 2 octobre ? 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