2 photos from Wikimedia Commons · credits & licences
- 1. Mi2n neuvilleU: Eole99· CC BY-SA 3.0
- 2. MI2N Altéo IDFM: S.G En Mobilité !· CC BY-SA 4.0
what is it?
The MI 2N "Altéo" (French: Matériel d'Interconnexion à 2 Niveaux, lit. 'two-level interconnection rolling stock'), also designated Class Z 1500, is a double-deck, dual-voltage electric multiple unit (EMU) operated on RER A, part of the Réseau Express Régional (RER), a hybrid suburban commuter and rapid transit system serving Paris and the surrounding Île-de-France region. The MI 2N "Altéo" is the version of the MI 2N series developed for the RATP Group. It closely resembles the SNCF Class Z 22500 (MI 2N "Éole") operated by SNCF, although the two variants differ in their motorization and interior layout.
who runs it
base stats
Bars compare against all trains: 600 km/h (maglev), 1,700 seats; power, weight and number built on a log scale up to 20 MW, 1,000 t and 20,000 built.
fun facts
- First built 29 years ago, in 1997.
- 3.9 MW is about 46 family cars (~85 kW each) flat out.
- Weighs about as much as 48 African elephants (~6 t each).
- 112 m long: about 25 cars parked nose to tail.
- Still in service after 29 years.
multiple unit: A self-propelled train: motors are spread under the passenger cars, so no separate locomotive.
spec sheet
- built
- 1997
- in service from
- 1997
- status
- in service
- number built
- —
- kind
- multiple unit
- traction
- electric
- origin
- 🇫🇷 France
- builders
- Alstom, Alstom Crespin
- operators
- RATP, Société nationale des chemins de fer français, SNCF Voyageurs
- top speed
- 120 km/h
- power
- 3.9 MW
- gauge
- 1,435 mm standard gauge
- electric system
- Overhead line:, 3, 3
- wheel arrangement
- 2′2′+Bo′Bo′+Bo′Bo′+Bo′Bo′+2′2′
- formation
- 5 cars per trainset (R+M+M+M+R)
- length
- 112 m
- weight
- 288 t
From the Wikipedia infobox and Wikidata. Blank means the sources don't say.
Sources: Wikidata Q607537, Wikipedia: Altéo (CC BY-SA 4.0).Updated 2026-10-25.