{"name": "Southern bypass of Ern\u00e9e on the RN 12 (D\u00e9viation sud d\u2019Ern\u00e9e par la RN 12).", "slug": "southern-bypass-of-ernee-on-the-rn-12-deviation-sud-dernee-par-la-rn-12-2a0bbcd4a8e700cc", "as_of": "2026-10-03T19:58:06.606135+00:00", "depth": "basic", "facts": {"name": {"value": "Southern bypass of Ern\u00e9e on the RN 12 (D\u00e9viation sud d\u2019Ern\u00e9e par la RN 12).", "rights": "facts_only", "source": {"url": "https://www.igedd.developpement-durable.gouv.fr/IMG/pdf/2_-_deviation_sud_d_ernee_53_par_la_rn_12_2e_avis__cle77be15.pdf", "name": "IGEDD environmental authority native opinion text", "origin": "live", "checksum": "8d87a6942183eab2d207e91d8c0a9b134025247d6c4d420ef01d4f2380f39304", "observed_at": "2026-10-03T18:21:35.508066+00:00", "revision_id": "e7306b17-ec52-4c15-a27d-7228e29bcaca", "published_at": null}, "locator": "page:3", "claim_id": "be3b83b4-33f9-450a-89e3-1c797efd958d", "modality": "reported", "confidence": 0.9, "valid_from": null, "attribution": "IGEDD environmental authority assessment and attributed developer synthesis", "evidence_id": "8101be92-ff96-40b6-975a-ba3dc62ae19b", "valid_until": null, "assertion_id": "97ae7319-4660-4b35-9319-3af1792ad65b", "temporal_expression": "", "extraction_confidence": 0.9}, "scope": {"value": "A bidirectional 5 km road with a 2\u00d71 carriageway: 3.6 km of new alignment west of Ern\u00e9e and 1.4 km requalification of the existing RD 31 to the east. The described works include three overtaking sections, a viaduct across the Ern\u00e9e valley, reinstatement of the RD 514, five roundabouts, four cycle-route sections, agricultural and ecological access/restoration structures, six natural-flow crossings, and road-runoff collection and treatment basins. The source also describes a carpooling area linked to a road access and coach stop.", "rights": "facts_only", "source": {"url": "https://www.igedd.developpement-durable.gouv.fr/IMG/pdf/2_-_deviation_sud_d_ernee_53_par_la_rn_12_2e_avis__cle77be15.pdf", "name": "IGEDD environmental authority native opinion text", "origin": "live", "checksum": "8d87a6942183eab2d207e91d8c0a9b134025247d6c4d420ef01d4f2380f39304", "observed_at": "2026-10-03T18:21:35.508066+00:00", "revision_id": "e7306b17-ec52-4c15-a27d-7228e29bcaca", "published_at": null}, "locator": "page:5", "claim_id": "3e27d470-f093-4b90-9f9f-eca15f17ed61", "modality": "planned", "confidence": 0.9, "valid_from": null, "attribution": "IGEDD environmental authority assessment and attributed developer synthesis", "evidence_id": "d3e4dd8b-8ba2-4a14-a8d7-eadf600f4d1a", "valid_until": null, "assertion_id": "b57685ab-f93e-4980-aa32-376dae2fe075", "temporal_expression": "", "extraction_confidence": 0.9}, "ecology": {"value": "The source describes effects on a bocage and watercourse setting, including destruction of 1.8 km of hedges, and impacts on habitats and agricultural land. It reports seven compensation sites and measures including hedge planting (7.3 km for 1.8 km destroyed), wetland and habitat restoration, watercourse work, ponds and ecological crossings. The environmental authority also reports an unfavorable greenhouse-gas balance, heavily affected by construction, and says induced development around the bypass is not adequately assessed; it recommends further consideration of these effects and related measures.", "rights": "facts_only", "source": {"url": "https://www.igedd.developpement-durable.gouv.fr/IMG/pdf/2_-_deviation_sud_d_ernee_53_par_la_rn_12_2e_avis__cle77be15.pdf", "name": "IGEDD environmental authority native opinion text", "origin": "live", "checksum": "8d87a6942183eab2d207e91d8c0a9b134025247d6c4d420ef01d4f2380f39304", "observed_at": "2026-10-03T18:21:35.508066+00:00", "revision_id": "e7306b17-ec52-4c15-a27d-7228e29bcaca", "published_at": null}, "locator": "page:7", "claim_id": "cf4e9dee-2773-4bb5-be24-728590542801", "modality": "reported", "confidence": 0.9, "valid_from": null, "attribution": "IGEDD environmental authority assessment and attributed developer synthesis", "evidence_id": "9d765378-3f3a-4948-a103-fc2a3d8fb47f", "valid_until": null, "assertion_id": "1ecdb4e2-dd2f-48f8-86ba-d0771df5197a", "temporal_expression": "", "extraction_confidence": 0.9}, "activity": {"value": "Intended to divert mainly transit traffic from Ern\u00e9e\u2019s centre, with expected road-safety and quality-of-life benefits, and to complement the separate north-east RD 31 bypass opened in 2019. The environmental authority cautions that the current RN 12 will still pass through the centre and that its requalification has not advanced; it considers that requalification important to achieving the project\u2019s stated objectives. It also recommends recalibrating traffic projections using 2023 counts and experience from other bypasses, rather than relying on the unrevised initial model.", "rights": "facts_only", "source": {"url": "https://www.igedd.developpement-durable.gouv.fr/IMG/pdf/2_-_deviation_sud_d_ernee_53_par_la_rn_12_2e_avis__cle77be15.pdf", "name": "IGEDD environmental authority native opinion text", "origin": "live", "checksum": "8d87a6942183eab2d207e91d8c0a9b134025247d6c4d420ef01d4f2380f39304", "observed_at": "2026-10-03T18:21:35.508066+00:00", "revision_id": "e7306b17-ec52-4c15-a27d-7228e29bcaca", "published_at": null}, "locator": "page:3", "claim_id": "e68dbf12-2f2b-47af-a710-8c848af98059", "modality": "reported", "confidence": 0.9, "valid_from": null, "attribution": "IGEDD environmental authority assessment and attributed developer synthesis", "evidence_id": "8101be92-ff96-40b6-975a-ba3dc62ae19b", "valid_until": null, "assertion_id": "f50854a2-4d70-4b3b-b83e-f1eaed2905e1", "temporal_expression": "", "extraction_confidence": 0.9}, "location": {"value": "Around Ern\u00e9e, in the Mayenne department, Pays de la Loire, France, on the RN 12 corridor between Foug\u00e8res and Alen\u00e7on. The new section is west of Ern\u00e9e and the RD 31 section to be requalified is to the east.", "rights": "facts_only", "source": {"url": "https://www.igedd.developpement-durable.gouv.fr/IMG/pdf/2_-_deviation_sud_d_ernee_53_par_la_rn_12_2e_avis__cle77be15.pdf", "name": "IGEDD environmental authority native opinion text", "origin": "live", "checksum": "8d87a6942183eab2d207e91d8c0a9b134025247d6c4d420ef01d4f2380f39304", "observed_at": "2026-10-03T18:21:35.508066+00:00", "revision_id": "e7306b17-ec52-4c15-a27d-7228e29bcaca", "published_at": null}, "locator": "page:3", "claim_id": "a1a1dda4-e2f2-41a6-b277-dd00eb0b2262", "modality": "reported", "confidence": 0.9, "valid_from": null, "attribution": "IGEDD environmental authority assessment and attributed developer synthesis", "evidence_id": "8101be92-ff96-40b6-975a-ba3dc62ae19b", "valid_until": null, "assertion_id": "38720fd1-6b1f-40ab-b1ee-93bf16c34a04", "temporal_expression": "", "extraction_confidence": 0.9}, "investment": {"value": "The source gives a total project cost of \u20ac43.5 million and reports financing shares of 72.5% State, 12.5% Region, 10% Mayenne Department and 5% Ern\u00e9e intercommunal community, in connection with the 2021\u20132027 State\u2013Region plan. The source does not establish disbursement or financial close.", "rights": "facts_only", "source": {"url": "https://www.igedd.developpement-durable.gouv.fr/IMG/pdf/2_-_deviation_sud_d_ernee_53_par_la_rn_12_2e_avis__cle77be15.pdf", "name": "IGEDD environmental authority native opinion text", "origin": "live", "checksum": "8d87a6942183eab2d207e91d8c0a9b134025247d6c4d420ef01d4f2380f39304", "observed_at": "2026-10-03T18:21:35.508066+00:00", "revision_id": "e7306b17-ec52-4c15-a27d-7228e29bcaca", "published_at": null}, "locator": "page:4", "claim_id": "138ba996-2040-449f-b947-3bb954eff12e", "modality": "reported", "confidence": 0.9, "valid_from": null, "attribution": "IGEDD environmental authority assessment and attributed developer synthesis", "evidence_id": "16cc5f88-a61f-41b3-8a50-e657fe7bbd3f", "valid_until": null, "assertion_id": "bbe597a5-ea52-4cb8-891d-cf01eb847cda", "temporal_expression": "", "extraction_confidence": 0.9}, "regulatory": {"value": "The bypass was declared of public utility by prefectural order on 30 July 2021. The source says it requires authorization under water legislation and is subject to an application for derogation from prohibitions on destroying protected species and habitats. The National Council for Nature Protection opinion was not yet available when the environmental authority deliberated on 10 October 2025. That authority\u2019s opinion is advisory, not an authorization decision, and is neither favorable nor unfavorable.", "rights": "facts_only", "source": {"url": "https://www.igedd.developpement-durable.gouv.fr/IMG/pdf/2_-_deviation_sud_d_ernee_53_par_la_rn_12_2e_avis__cle77be15.pdf", "name": "IGEDD environmental authority native opinion text", "origin": "live", "checksum": "8d87a6942183eab2d207e91d8c0a9b134025247d6c4d420ef01d4f2380f39304", "observed_at": "2026-10-03T18:21:35.508066+00:00", "revision_id": "e7306b17-ec52-4c15-a27d-7228e29bcaca", "published_at": null}, "locator": "page:2", "claim_id": "8cf62dff-f124-4825-b9e9-7bc428d5b585", "modality": "reported", "confidence": 0.9, "valid_from": null, "attribution": "IGEDD environmental authority assessment and attributed developer synthesis", "evidence_id": "f6c6cd12-f9cb-426e-90ac-f817f04723d3", "valid_until": null, "assertion_id": "73ea1876-b057-4bab-9719-19ed438a6dc1", "temporal_expression": "", "extraction_confidence": 0.9}, "next_milestone": {"value": "A public consultation was expected before the end of 2025. The supplied source does not confirm whether it took place.", "rights": "facts_only", "source": {"url": "https://www.igedd.developpement-durable.gouv.fr/IMG/pdf/2_-_deviation_sud_d_ernee_53_par_la_rn_12_2e_avis__cle77be15.pdf", "name": "IGEDD environmental authority native opinion text", "origin": "live", "checksum": "8d87a6942183eab2d207e91d8c0a9b134025247d6c4d420ef01d4f2380f39304", "observed_at": "2026-10-03T18:21:35.508066+00:00", "revision_id": "e7306b17-ec52-4c15-a27d-7228e29bcaca", "published_at": null}, "locator": "page:9", "claim_id": "c3b387ae-a81a-44c7-b47e-6a6f041c88ca", "modality": "planned", "confidence": 0.9, "valid_from": null, "attribution": "IGEDD environmental authority assessment and attributed developer synthesis", "evidence_id": "5eab5d63-8906-4d29-8239-9db2db80b45d", "valid_until": null, "assertion_id": "0be88a53-38dd-4880-8fbf-db2b75cebdee", "temporal_expression": "", "extraction_confidence": 0.9}, "implementing_agency": {"value": "The French State, through the regional directorate for environment, planning and housing for Pays de la Loire (DREAL), is identified as the project owner (ma\u00eetre d\u2019ouvrage).", "rights": "facts_only", "source": {"url": "https://www.igedd.developpement-durable.gouv.fr/IMG/pdf/2_-_deviation_sud_d_ernee_53_par_la_rn_12_2e_avis__cle77be15.pdf", "name": "IGEDD environmental authority native opinion text", "origin": "live", "checksum": "8d87a6942183eab2d207e91d8c0a9b134025247d6c4d420ef01d4f2380f39304", "observed_at": "2026-10-03T18:21:35.508066+00:00", "revision_id": "e7306b17-ec52-4c15-a27d-7228e29bcaca", "published_at": null}, "locator": "page:3", "claim_id": "069e42a0-0ad5-45e2-a856-a3e86480cad0", "modality": "reported", "confidence": 0.9, "valid_from": null, "attribution": "IGEDD environmental authority assessment and attributed developer synthesis", "evidence_id": "8101be92-ff96-40b6-975a-ba3dc62ae19b", "valid_until": null, "assertion_id": "927cde93-ff1f-42ed-85e4-2d444087d951", "temporal_expression": "", "extraction_confidence": 0.9}}, "origin": "snapshot", "revision": 1, "timeline": [], "is_sample": false, "project_id": "01273f3d-1280-484e-8149-e7ef81e67391", "publication": {"local_only": false, "reviewed_at": "2026-10-15T18:19:25.475416+00:00", "indexability": "noindex", "buying_window": "unknown", "policy_version": "accepted-destination-v1", "template_version": "dossier-v1"}, "public_summary": "Southern bypass of Ern\u00e9e on the RN 12\n\nThe proposed project is a 5 km bidirectional road: 3.6 km of new alignment west of Ern\u00e9e and 1.4 km of requalification of the RD 31 to the east. The works described include a viaduct across the Ern\u00e9e valley, cycle-route sections and road-runoff treatment basins. The project owner is the French State, through the Pays de la Loire DREAL. \n\nThe project is intended to divert mainly transit traffic from Ern\u00e9e\u2019s centre and complement the north-east RD 31 bypass opened in 2019. The environmental authority notes that the existing RN 12 would still pass through the centre and that its requalification had not advanced; it considers requalification important to achieving the stated objectives. It also recommends recalibrating traffic projections using 2023 counts and experience from other bypasses. \n\nThe opinion describes seven compensation sites and measures including 7.3 km of hedge planting for 1.8 km destroyed. It also characterizes the project\u2019s greenhouse-gas balance as unfavorable, with construction a major contributor, and says induced development around the bypass is not adequately assessed. \n\nThe source reports a total cost of \u20ac43.5 million and financing shares associated with the 2021\u20132027 State\u2013Region plan; it does not establish disbursement or financial close. \n\nThe environmental authority\u2019s opinion, deliberated on 10 October 2025, is advisory and is not an authorization decision. The source reports the project\u2019s declaration of public utility and required authorization processes. Source: [IGEDD environmental authority opinion](https://www.igedd.developpement-durable.gouv.fr/IMG/pdf/2_-_deviation_sud_d_ernee_53_par_la_rn_12_2e_avis__cle77be15.pdf), dated 10 October 2025.", "schema_version": "1.0", "public_unknowns": ["The opinion expected a public consultation before the end of 2025 but does not confirm whether it occurred or give later authorization outcomes. It records that the National Council for Nature Protection opinion was not available on 10 October 2025.", "The source does not establish whether traffic projections were recalibrated, whether the existing RN 12 through Ern\u00e9e was requalified, or the project\u2019s subsequent construction or opening status.", "The opinion does not identify construction contractors or procurement packages or report procurement status.", "The source does not establish whether the reported financing shares were fully committed or disbursed.", "The opinion includes maps and figures; their graphical details were not interpreted for this page."], "evidence_observed_at": "2026-10-03T18:21:35.508066+00:00", "knowledge_reviewed_at": "2026-10-15T18:19:25.475416+00:00", "decisive_evidence_observed_at": "2026-10-03T18:21:35.508066+00:00", "export_metadata": {"publisher": "CapexCue", "project_title": "Southern bypass of Ern\u00e9e on the RN 12 (D\u00e9viation sud d\u2019Ern\u00e9e par la RN 12).", "original_project_title": "Southern bypass of Ern\u00e9e on the RN 12 (D\u00e9viation sud d\u2019Ern\u00e9e par la RN 12).", "canonical_url": "https://capexcue.com/projects/southern-bypass-of-ernee-on-the-rn-12-deviation-sud-dernee-par-la-rn-12-2a0bbcd4a8e700cc/", "release": {"id": "b3cb1806-7a2c-42eb-9dd1-c8db58175c8b", "number": 1, "published_at": "2026-10-15T18:19:26.938693+00:00"}, "release_reference": "release 1 (b3cb1806-7a2c-42eb-9dd1-c8db58175c8b)", "current_dossier_url": "https://capexcue.com/projects/southern-bypass-of-ernee-on-the-rn-12-deviation-sud-dernee-par-la-rn-12-2a0bbcd4a8e700cc/", "citation": "CapexCue \u2014 Southern bypass of Ern\u00e9e on the RN 12 (D\u00e9viation sud d\u2019Ern\u00e9e par la RN 12). \u2014 dossier released 2026-10-15T18:19:26.938693+00:00, release 1 (b3cb1806-7a2c-42eb-9dd1-c8db58175c8b) \u2014 https://capexcue.com/projects/southern-bypass-of-ernee-on-the-rn-12-deviation-sud-dernee-par-la-rn-12-2a0bbcd4a8e700cc/.", "edition_note": "This file records the release identified above; visit the current dossier for later updates.", "presentation": {"version": "dossier-presentation-v7", "project_milestones": [], "project_category": {"basis": "independently_reviewed_metadata", "value": "transport_logistics", "support": {"end": 75, "start": 0, "sources": [{"url": "https://www.igedd.developpement-durable.gouv.fr/IMG/pdf/2_-_deviation_sud_d_ernee_53_par_la_rn_12_2e_avis__cle77be15.pdf", "name": "IGEDD environmental authority native opinion text", "origin": "live", "checksum": "8d87a6942183eab2d207e91d8c0a9b134025247d6c4d420ef01d4f2380f39304", "observed_at": "2026-10-03T18:21:35.508066+00:00", "revision_id": "e7306b17-ec52-4c15-a27d-7228e29bcaca", "published_at": null}], "modality": "reported", "predicate": "name", "raw_value": "Southern bypass of Ern\u00e9e on the RN 12 (D\u00e9viation sud d\u2019Ern\u00e9e par la RN 12).", "statement": "Southern bypass of Ern\u00e9e on the RN 12 (D\u00e9viation sud d\u2019Ern\u00e9e par la RN 12).", "qualifications": {"attribution": "IGEDD environmental authority assessment and attributed developer synthesis"}}, "label": "Transport and logistics", "icon": "bridge"}, "project_metadata": {"version": "released-metadata-v7", "category": {"basis": "independently_reviewed_metadata", "value": "transport_logistics", "support": {"end": 75, "start": 0, "sources": [{"url": "https://www.igedd.developpement-durable.gouv.fr/IMG/pdf/2_-_deviation_sud_d_ernee_53_par_la_rn_12_2e_avis__cle77be15.pdf", "name": "IGEDD environmental authority native opinion text", "origin": "live", "checksum": "8d87a6942183eab2d207e91d8c0a9b134025247d6c4d420ef01d4f2380f39304", "observed_at": "2026-10-03T18:21:35.508066+00:00", "revision_id": "e7306b17-ec52-4c15-a27d-7228e29bcaca", "published_at": null}], "modality": "reported", "predicate": "name", "raw_value": "Southern bypass of Ern\u00e9e on the RN 12 (D\u00e9viation sud d\u2019Ern\u00e9e par la RN 12).", "statement": "Southern bypass of Ern\u00e9e on the RN 12 (D\u00e9viation sud d\u2019Ern\u00e9e par la RN 12).", "qualifications": {"attribution": "IGEDD environmental authority assessment and attributed developer synthesis"}}}, "input_hash": "0f79e405c3a1e7ce374d19bac1e28c29b7e416d56d7eaa1a315c16edc31eaae5", "release_id": "b3cb1806-7a2c-42eb-9dd1-c8db58175c8b", "type_codes": ["road"], "field_states": {"type": {"state": "accepted", "reason": "The physical scope is a bidirectional 5 km road scheme: 3.6 km of new alignment west of Ern\u00e9e and 1.4 km of requalification of existing RD 31 to the east, with overtaking sections, a viaduct, roundabouts, road crossings and runoff-treatment basins. The scope also describes four cycle-route sections, agricultural and ecological access or restoration structures, and a carpooling area linked to road access and a coach stop; these mixed components are retained here, but the supplied type codes provide no separate code for those facilities. The separate north-east RD 31 bypass opened in 2019 is a comparator, not part of this project. Environmental compensation measures and the source's adverse assessment of greenhouse-gas effects do not change the road type. The supplied facts about ownership, financing, authorization and planned consultation do not establish a different type or construction status."}, "region": {"state": "accepted", "reason": "derived_from_accepted_countries"}, "country": {"state": "accepted", "reason": "The supplied location places the physical project around Ern\u00e9e, in the Mayenne department, Pays de la Loire, France. This is based on the stated project location, not the identity of its project owner. The references to the existing RN 12 through the centre and the separate north-east RD 31 bypass do not establish a different project location. The impact, cost, regulatory and planned-consultation facts do not conflict with the stated location."}, "category": {"state": "accepted", "reason": "This is a road bypass and requalification project. Its stated purpose is to divert mainly transit traffic, although the source cautions that the existing RN 12 will still pass through the centre and that its requalification has not advanced. The environmental effects, mitigation works, runoff treatment and water-related authorizations are associated impacts or measures, not the project's primary asset purpose. The owner, financing, public-utility declaration and planned consultation do not change the asset category."}}, "region_codes": ["europe"], "release_hash": "ec71baa68242b43c2b282400ccfe29b62c7a08a48f2392788fe92e803b27d123", "assessment_id": "d5a90397-df92-47ad-8d45-9ecaff71efd9", "country_codes": ["FR"], "assessment_hash": "0a6a4861e2ebf841cfc33c62d06c7f60dbb2054733f352ef5f9c9071376945a6", "country_label": "France", "region_label": "Europe", "type_labels": ["Road"]}, "date_note": "Project event times are distinct from source publication, observation and dossier release dates. An elapsed plan does not establish completion."}}}