MR3V / MR6V
In service	2025
Manufacturer	Alstom
Built at	Valenciennes
Family name	Metropolis
Constructed	2020–present
Number built	MR3V: 3 MR6V: 2
Number in service	2 in test (static and dynamic test for now) in the workshop of line 15. 4 or more in test at Alstom factory[1]
Formation	MR3V: 3 cars MR6V: 6 cars
Capacity	MR3V: 500 per train MR6V: 1,000 per train[2]
Operators	MR3V: Keolis[3] MR6V: ORA (RATP Dev, Alstom and ComfortDelGro)[4]
Depots	MR3V: Aulnay MR6V: Champigny-Bondy
Lines served	MR3V:    MR6V:
Specifications
Train length	MR3V: 54 m (177 ft 2 in) MR6V: 108 m (354 ft 4 in)
Car length	18 m (59 ft 1 in)
Width	2.8 m (9 ft 2 in)
Doors	3 per side
Maximum speed	110 km/h (68 mph)
Weight	MR3V: 100 t (220,000 lb) MR6V: 200 t (440,000 lb)
Traction system	Alstom OptoniX IGBT VVVF
Electric system(s)	Overhead line, 1,500 V DC
Current collector(s)	Pantograph
UIC classification	MR3V: Bo'Bo'+2'2'+Bo'Bo' MR6V: Bo'Bo'+2'2'+Bo'Bo'+Bo'Bo'+2'2'+Bo'Bo'
Braking system(s)	Electrodynamic, regenerative, disc, eddy current[5]
Coupling system	Scharfenberg type
Track gauge	1,435 mm (4 ft 8+1⁄2 in) standard gauge

MR3V/6V project name, for "Matériel Roulant 3 Voitures / 6 Voitures" (Rolling Stock 3 Cars / 6 Cars) are future rolling stock, to equip the new lines 15, 16 and 17 of the Paris Metro.

In May 2018, the Société du Grand Paris announced that the manufacturer Alstom was approached to win the contracts for the trains on lines 15, 16 and 17 of the Grand Paris Express. The contract provides for the delivery of a maximum of 1,000 cars, which are divided into 133 six-car trains for line 15 and 50 three-car trains for lines 16 and 17, all based on the Metropolis family trains.^[6][7]

On 20 September 2018, the contract was officially signed with Alstom for the manufacture of rolling stock for a total cost of 1.3 billion euros and, quickly, a sketch of the design of this rolling stock was unveiled.^[8] The first 3-car sets were seen at the beginning of November 2021 in dynamic tests in the Alstom rail test centre in Valenciennes.

During the year 2021 the first images of the trains were unveiled on twitter. In 2022 tests were carried out on a test track at an Alstom factory in the north of France.

On June 22, 2023, the first MR6V train arrived at the Champigny depot on line 15. The second arrived on July 3 and will allow static tests to be carried out until November 2023, when dynamic tests will begin on the now completed East section, of line 15.

The MR3V / MR6V are fully automated with open-gangway connections.^[9] They are planned in two versions: with six cars (MR6V), for a length of 108 m (354 ft 3+31⁄32 in), and with three cars (MR3V), for a length of 54 m (177 ft 1+31⁄32 in). Unlike the classic 2.40 m (7 ft 10+1⁄2 in) gauge of the Paris metro, these trains will be 2.80 m (9 ft 2+1⁄4 in) wide. The capacity of the trains is respectively, for the compositions of three and six cars, 500 and 1000 seats, 20% of which are seated. They will be powered by a 1,500 V DC overhead catenary.^[10]

The exterior design of the trains was unveiled in early December 2018 with three variants. A consultation open to the public took place during December 2018 to allow the choice of the chosen design. After 20 days of consultation and 13,000 voters, it was the second design with "encompassing lines for the nose of the train" that was chosen by 40% of respondents.^[11]

The interior of the trains will have the new IDFM seats.

will use driverless trains in a 6-car formation, MR6V (4M2T).

As of 1 March 2022, 2 six-car sets were built at Valenciennes factory.

will use driverless 3-car trainsets, MR3V. (2M1T).

As of 5 May 2022, three completed trains are on standby at Alstom factory for tests.

• Cars 1 and 3 each have 2 pantographs (one for emergency, one for service)
• "M" motorised car
• "T" Trailer car