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| Métro ligne 1 (Paris Métro) | |
|---|---|
| Name | Ligne 1 |
| Native name | Ligne 1 du métro de Paris |
| Type | Métro |
| System | Régie autonome des transports parisiens |
| Status | Active |
| Locale | Paris, Île-de-France |
| Start | La Défense / Château de Vincennes |
| Stations | 25 |
| Open | 1900 |
| Owner | RATP |
| Operator | RATP |
| Line length | 16.5 km |
| Electrification | 750 V DC third rail |
| Gauge | Standard gauge |
Métro ligne 1 (Paris Métro) is the oldest line of the Paris Métro network, inaugurated at the turn of the 20th century and serving a central east–west axis across Paris. The line connects major urban nodes including La Défense, Châtelet–Les Halles, Arc de Triomphe, and Porte de Vincennes, intersecting lines of the Réseau express régional and national rail such as Gare Saint-Lazare and Gare de Lyon. Over its existence the line has been associated with major figures and institutions like Fulgence Bienvenüe, Georges-Eugène Haussmann, and the Conseil municipal de Paris, and has influenced urban projects including the development of La Défense and the Petite Ceinture conversion debates.
Line 1 opened as part of the original Paris Métro project under engineer Fulgence Bienvenüe and architect Hector Guimard; its inauguration in 1900 followed the Exposition Universelle (1900) and aligned with municipal ambitions championed by mayor Henri Rivières and municipal councils such as the Conseil municipal de Paris. Early extensions connected termini at Porte Maillot and Château de Vincennes, while later 20th-century expansions reached La Défense during the development promoted by the Société Foncière Lyonnaise and planners linked to the Département des Hauts-de-Seine. During World War II operations were affected by occupation policies involving agencies like the Milice française and disruptions tied to events including the Liberation of Paris. Postwar modernization involved collaborations with industrial firms like Alsthom and Thomson-Brandt and municipal programs supported by the Ministère de l'Équipement. The 21st century saw automation retrofits inspired by systems in Copenhagen Metro and London, with partnerships involving Siemens and Bombardier Transportation to implement driverless technology and platform screen doors in line with safety regulations under the Ministère de l'Intérieur.
The line traverses central Paris from west to east, starting at La Défense Grande Arche and running through Porte Maillot, past Charles de Gaulle–Étoile beneath the Place de l'Étoile, along the Avenue des Champs-Élysées near Franklin D. Roosevelt station, through interchange hubs such as Concorde, Tuileries, Louvre–Rivoli, then under Île de la Cité adjacent to Châtelet–Les Halles, onward to République, Bastille near the Opéra Bastille, and terminating at Porte de Vincennes. Key transfer points link to RER A, RER B, RER D, and mainline services at Gare de Lyon and Gare Saint-Lazare while also intersecting multiple Métro lines including Line 4, Line 7, and Line 14. Stations such as Charles de Gaulle–Étoile and Châtelet–Les Halles feature intermodal designs coordinated with authorities like the SNCF and planning documents from the Île-de-France Mobilités authority.
Original rolling stock included wooden-bodied cars produced by firms like Brillié and Decauville; subsequent generations comprised steel models from manufacturers such as Société Française de Construction Mécanique and later multiple series by Alstom and Bombardier Transportation. The modernization program introduced the MP 89 rubber-tyred trains and later the automated MP 05 units developed in cooperation with Alstom and Siemens. The fleet features regenerative braking technology, air-conditioning experiments linked to suppliers including Valeo and safety equipment specified under standards from the Union Internationale des Chemins de fer and overseen by the RATP maintenance divisions at depots such as the Vincennes depot.
Line operation is managed by the RATP with timetable coordination involving the Île-de-France Mobilités authority, using high-frequency services during peak hours and all-night maintenance windows scheduled after coordination with municipal events like Fête de la Musique and major matches at venues served via Porte de Vincennes. Automation led to the removal of driver cab roles and the adoption of centralised control rooms modeled after installations at RATP Control Centre and integrated with Paris traffic control such as the Préfecture de Police (Paris). Service patterns are optimized for interchange flows at nodes like Châtelet–Les Halles and Charles de Gaulle–Étoile and coordinated with bus operators including RATP BusNetwork and tram systems such as Île-de-France tramway lines.
Track infrastructure uses standard gauge rails, a 750 V DC third rail supply, and rubber-tyred guideways on portions influenced by earlier experiments dating to projects with Michel Croce and other engineers, with civil works employing techniques refined since the Haussmann renovation of Paris era. Signalling evolved from manual block systems to automated moving block and Communications-Based Train Control projects with subcontractors like Siemens Mobility and Thales Group, enabling driverless operation and integration of platform screen doors at busy stations following safety directives from the Ministère des Transports. Tunnel and station architecture feature heritage elements by Hector Guimard alongside modern interventions overseen by agencies such as the Direction régionale et interdépartementale de l'Équipement et de l'Aménagement.
Line 1 carries one of the highest passenger volumes in the network, serving commuters, tourists visiting landmarks like Louvre Museum, Musée d'Orsay, and Palais Garnier, and workers commuting to business districts including La Défense and Paris La Défense Arena. Its ridership patterns influence urban planning debates involving the Île-de-France Region, real estate development by groups like Unibail-Rodamco-Westfield, and mobility policy set by Île-de-France Mobilités. The line's automation and modernization projects have been cited in comparative studies alongside transport systems such as the Tokyo Metro and New York City Subway regarding capacity, safety, and accessibility improvements advocated by organizations including UITP and European Commission urban mobility initiatives.