{"id":4233,"date":"2025-12-22T18:21:22","date_gmt":"2025-12-22T18:21:22","guid":{"rendered":"https:\/\/infos-media-nantes.fr\/?p=4233"},"modified":"2025-12-22T18:21:23","modified_gmt":"2025-12-22T18:21:23","slug":"rd178-nantes-vendee-amenagement-2x2-voies-2029","status":"publish","type":"post","link":"https:\/\/infos-media-nantes.fr\/rd178-nantes-vendee-amenagement-2x2-voies-2029\/","title":{"rendered":"RD178 entre Nantes et la Vend\u00e9e : le D\u00e9partement valide un am\u00e9nagement majeur d\u2019ici 2029"},"content":{"rendered":"\n<article style=\"font-family:Inter,system-ui,Arial,sans-serif;color:#222;line-height:1.65;max-width:1100px;margin:auto;padding:20px;\">\n\n<header>\n \n  <p>\n    Les \u00e9lus du D\u00e9partement de Loire-Atlantique ont adopt\u00e9 la d\u00e9claration de projet de la RD178.\n    Ce chantier structurant pr\u00e9voit la mise en 2\u00d72 voies sur plusieurs kilom\u00e8tres, la cr\u00e9ation\n    d\u2019une voie r\u00e9serv\u00e9e aux transports en commun et au covoiturage, ainsi que des am\u00e9nagements\n    environnementaux d\u2019envergure.\n  <\/p>\n<\/header>\n\n<section>\n  <p>\n    R\u00e9unis en session le lundi 15 d\u00e9cembre 2025, les \u00e9lus d\u00e9partementaux ont confirm\u00e9\n    l\u2019int\u00e9r\u00eat g\u00e9n\u00e9ral du projet d\u2019am\u00e9nagement de la RD178, un axe strat\u00e9gique reliant\n    la m\u00e9tropole nantaise \u00e0 la Vend\u00e9e. Cette d\u00e9cision marque une \u00e9tape cl\u00e9 pour un\n    projet engag\u00e9 de longue date, destin\u00e9 \u00e0 r\u00e9pondre \u00e0 l\u2019augmentation du trafic\n    quotidien et aux enjeux de mobilit\u00e9 durable dans le sud de l\u2019agglom\u00e9ration.\n  <\/p>\n\n  <p>\n    Apr\u00e8s la mise en service de l\u2019\u00e9changeur de Viais \u00e0 Pont-Saint-Martin en janvier 2022,\n    le D\u00e9partement pr\u00e9voit d\u00e9sormais un passage \u00e0 2\u00d72 voies sur 8 kilom\u00e8tres,\n    entre l\u2019\u00e9changeur de Tournebride \u00e0 La Chevroli\u00e8re et l\u2019autoroute A83.\n  <\/p>\n<\/section>\n\n<section>\n  <h2>Une voie r\u00e9serv\u00e9e pour encourager les mobilit\u00e9s alternatives<\/h2>\n  <p>\n    Le projet comprend \u00e9galement la cr\u00e9ation d\u2019une voie r\u00e9serv\u00e9e aux transports en commun\n    et au covoiturage, appel\u00e9e VR2+, entre l\u2019\u00e9changeur de Viais et l\u2019A83.\n    Cette voie, longue de 4 kilom\u00e8tres, sera am\u00e9nag\u00e9e \u00e0 la place de la bande d\u2019arr\u00eat\n    d\u2019urgence existante, limitant ainsi l\u2019artificialisation des sols.\n  <\/p>\n\n  <p>\n    Conform\u00e9ment \u00e0 la r\u00e9glementation nationale, la vitesse y sera limit\u00e9e \u00e0 50 km\/h,\n    contre 90 km\/h sur les autres voies de la section nord.\n    Cette configuration s\u2019inspire d\u2019am\u00e9nagements d\u00e9j\u00e0 r\u00e9alis\u00e9s sur l\u2019A83 par l\u2019\u00c9tat\n    et sur le boulevard de la Vend\u00e9e par Nantes M\u00e9tropole.\n  <\/p>\n<\/section>\n\n<section>\n  <h2>Un projet encadr\u00e9 sur plusieurs communes<\/h2>\n  <p>\n    L\u2019am\u00e9nagement concerne les territoires de La Chevroli\u00e8re, Pont-Saint-Martin,\n    Les Sorini\u00e8res et Le Bignon.\n    Selon le D\u00e9partement, l\u2019objectif est triple :\n    renforcer la s\u00e9curit\u00e9 routi\u00e8re, fluidifier la circulation sur un axe majeur\n    et favoriser les mobilit\u00e9s alternatives \u00e0 la voiture individuelle\n    en direction de la m\u00e9tropole nantaise.\n  <\/p>\n<\/section>\n\n<section>\n  <h2>Des mesures environnementales int\u00e9gr\u00e9es<\/h2>\n  <p>\n    Pour compenser la consommation fonci\u00e8re et les impacts sur la biodiversit\u00e9,\n    29 hectares de mesures compensatoires environnementales sont pr\u00e9vus.\n    Le projet inclut notamment le remplacement d\u2019un ouvrage hydraulique afin de\n    permettre le passage de la faune.\n  <\/p>\n\n  <p>\n    Un viaduc de 55 m\u00e8tres sera \u00e9galement construit pour franchir la rivi\u00e8re l\u2019Ognon,\n    afin de limiter les impacts directs des infrastructures sur le cours d\u2019eau\n    et ses abords naturels.\n  <\/p>\n<\/section>\n\n<section>\n  <h2>Un chantier sous circulation jusqu\u2019en 2029<\/h2>\n  <p>\n    Les travaux seront r\u00e9alis\u00e9s majoritairement sous circulation, avec l\u2019objectif\n    de r\u00e9duire autant que possible les nuisances pour les usagers.\n    La section nord du projet, programm\u00e9e d\u2019ici 2029, repr\u00e9sente un co\u00fbt estim\u00e9\n    \u00e0 31 millions d\u2019euros.\n  <\/p>\n\n  <p>\n    Le financement repose sur plusieurs partenaires :\n    la R\u00e9gion Pays de la Loire apporte 10 millions d\u2019euros,\n    tandis que l\u2019\u00c9tat contribue \u00e0 hauteur de 1,01 million d\u2019euros,\n    aux c\u00f4t\u00e9s du D\u00e9partement de Loire-Atlantique.\n  <\/p>\n<\/section>\n\n<!-- =========================================================\n     MINI-JEU IMN \u2014 QUIZ INTERACTIF DIFFICILE (15 QUESTIONS)\n========================================================= -->\n\n<section class=\"imn-quiz-wrap\">\n  <h2>Quiz : connais-tu vraiment le projet de la RD178 ?<\/h2>\n  <p>15 questions pour tester ta compr\u00e9hension du projet<\/p>\n\n  <div id=\"imn-quiz\"\n       style=\"max-width:520px;margin:20px auto;display:flex;flex-direction:column;\n              background:#fff;border:2px solid 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Ce chantier structurant pr\u00e9voit la mise en 2\u00d72 voies sur plusieurs kilom\u00e8tres, la cr\u00e9ation d\u2019une voie r\u00e9serv\u00e9e aux transports en commun et au covoiturage, ainsi que des am\u00e9nagements environnementaux d\u2019envergure. R\u00e9unis en session le lundi 15 d\u00e9cembre 2025, les \u00e9lus [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":4234,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"content-type":"","footnotes":"","event_start_date":"","event_end_date":"","event_location":"","imn_event_city":"","imn_event_start_time":"","imn_event_end_time":"","imn_event_all_day":"","imn_event_address":"","imn_event_ticket_url":"","imn_event_price":"","imn_event_status":"","imn_event_organizer":"","imn_event_accessibility":""},"categories":[22],"tags":[2853,2854,7,519,5,2852,436,281],"class_list":["post-4233","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-actualites-nantes","tag-amenagement-routier","tag-infrastructures-routieres","tag-loire-atlantique","tag-mobilites","tag-nantes","tag-rd178","tag-transports-en-commun","tag-vendee"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v28.8 - 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