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| MP 73 | |
|---|---|
| Name | MP 73 |
| Manufacturer | Alsthom |
| Family | MP |
| Yearconstruction | 1974–1976 |
| Numberbuilt | 52 trainsets |
| Formation | 9 cars per trainset |
| Capacity | 1,500 passengers |
| Operator | Régie Autonome des Transports Parisiens |
| Lines | Paris Métro Line 6 |
| Service | 1974–present |
MP 73 The MP 73 is a pneumatic-tyred electric multiple unit built by Alsthom for use on the Paris Métro network. Designed to replace steel-wheel rolling stock on the elevated and curved sections of Paris Métro Line 6, it combined rubber-tyred metro technology with articulated trainset design and entered service in the mid-1970s. The fleet has undergone mid-life refurbishments and remains an iconic element of urban transit in Île-de-France.
The MP 73 originated from a collaboration between SNCF-contracting engineers and Alsthom designers, building on lessons from the MP 59 and experimental vehicles such as the MP 55. Development focused on compatibility with the elevated structures of Line 6 and constraints imposed by stations like Bir-Hakeim and Nation. The design drew on technologies pioneered by Bombardier and influenced later projects such as the MP 89 and MP 05, while addressing issues observed during the 1973 oil crisis that accelerated investment in electric traction. Prototype testing occurred at the RATP test facilities and on sections adjacent to depots like Vaugirard before serial production at Alsthom factories.
Each MP 73 trainset comprises nine cars with rubber tyres running on guide bars, a development traced to the Paris Métro rubber-tyred system introduced with the MP 59. Traction equipment includes chopper control inspired by systems used on SNCF multiple units, with motors supplied by Jeumont-Schneider and bogie design influenced by Matra research. The electrical architecture interoperates with substations patterned after installations at Nation and Place d'Italie. Braking incorporates pneumatic and dynamic systems similar to those used on SPR prototypes. Passenger amenities and capacity were benchmarked against contemporaneous fleets such as the MF 67 and MF 77.
Commissioned in 1974–1976, the MP 73 entered passenger service amid modernization campaigns promoted by Georges Pompidou era transport policy and implemented by the RATP. Deployment on Line 6 replaced aging steel-wheel sets that had served since pre-war expansions tied to projects like the 1937 Paris Exposition. The fleet remained in primary service through the 1980s and 1990s, coexisting with newer types including the MP 89 CA on other lines, while maintenance regimes were coordinated with facilities at Saint-Ouen and Charonne depots.
MP 73 operations were tailored to the elevated profile and sharp curves of Line 6 between stations such as La Motte-Picquet–Grenelle and Nation, where visual integration with landmarks like the Eiffel Tower and engineering interactions with Pont de Bir-Hakeim were operational considerations. Timetabling adhered to standards set in regional planning documents involving STIF and services were adjusted during major events at venues such as Parc des Princes and Gare du Nord. Crew training followed protocols comparable to those for MP 59 and MP 73-era contemporaries at training centers tied to the RATP academy.
Refurbishment programs in the 1990s and 2010s modernized interiors, lighting, and braking systems, informed by safety reviews after incidents on lines operated with rolling stock like the MF 77. Upgrades included HVAC improvements referencing standards established for MP 89 refurbishments, retrofit of electronic diagnostics inspired by SNCF regional multiple units, and livery updates echoing corporate identity changes at RATP and regional branding by Île-de-France Mobilités. Some technical overhauls paralleled work on fleets such as the MP 59 mid-life programs.
Throughout its service life, the fleet experienced localized incidents that prompted investigations by bodies including BEA-TT and internal RATP safety units; these events led to procedural changes similar to reforms following high-profile occurrences on networks involving Gare de Lyon and Châtelet–Les Halles. Responses included enhanced maintenance cycles mirroring those adopted after incidents involving MF 67 sets and implementation of additional braking redundancy and door interlock measures comparable to upgrades on the MP 89.
A number of retired cars and mock-ups have been preserved by organizations such as the Conservatoire des Transports and displayed in exhibitions alongside earlier pioneers like the Sprague-Thomson stock. The MP 73 has been featured in photographic collections documenting Paris transit heritage and appears in cultural works that reference city infrastructure alongside landmarks like the Seine River and Île de la Cité. Enthusiast groups and museums that focus on rolling stock history maintain archives relating to the MP 73, contributing to studies comparing it with successors like the MP 14.
Category:Paris Métro rolling stock