The MPM-10 (Montréal Pneumatic Material 2010), commonly known as the Azur, is the third and newest generation of rubber-tired rolling stock used on the Montreal Metro in Canada, built by a consortium of Bombardier Transportation and Alstom. The first MPM-10 train entered into service on the Orange Line in February 2016, replacing the entire first-generation MR-63 fleet. 71 nine-car trains have been built, and are currently in service on the Orange and Green Lines.

By the mid-2000s, the original MR-63 Montreal Metro trains were around 40 years old, and maintenance costs were increasing.^[10] Société de transport de Montréal (STM) indicated that these trains would be replaced by modern rolling stock in the coming decade.^[11]

In May 2006, the Government of Quebec announced the negotiation of a $1.2 billion contract with Bombardier Transportation to replace the MR-63 fleet of 336 cars, then designated as MR-08.^[12][13] Trains were planned to enter service in the early 2010s.^[14] Alstom voiced its dismay over directly awarding the contract (to Bombardier) without a bidding process, noting that (like Bombardier) they would build new trains in Quebec.^[12] Negotiations between the STM and Bombardier were ongoing until 2007. The negotiations focused on the project's cost controls, terms of contract, train specifications and warranty.^[15] If negotiations had failed, the Quebec government and the STM would have reverted to a bidding process.

On 10 January 2008, Quebec Superior Court Judge Joel Silcoff rendered his decision regarding Alstom's filing of legal action against the Quebec government's Ministry of Transportation. The latter sought to bypass the bidding process, citing that Bombardier was the only domestic candidate capable of fulfilling the eventual contract. Silcoff ruled in favour of Alstom, enabling the company to bid on the contract.^[16]

As a consequence, the Government of Quebec decided to open the bidding process in February 2008, however this would delay delivery of the first trains by 9 to 12 months. In November 2008, Bombardier Transportation and Alstom announced that they would be submitting a joint bid to build the trains as a consortium.^[17]

In December 2009, CSR Zhuzhou Electric Locomotive expressed interest in bidding for the MR-08 contract citing a cheaper price than its competitors, and proposed an entirely steel-wheeled fleet of vehicles as opposed to the specified rubber-tired vehicles, citing advances in technology that gave steel wheels an advantage. CSR also proposed the construction of a factory in Quebec, creating up to 1,000 jobs and meeting the 60% Canadian content requirement.^[18] Spanish company CAF also expressed interest in the project, citing their experience in building rubber-tyred trains^[19] - and expressing concern about protectionism.^[20] However, the STM subsequently rejected both proposals.^[21]

The MPM-10 Azur features full-width open-gangways between the cars which can be occupied by passengers, resulting in 8% more train capacity than previous trains.^[50][46]

The trains are equipped with an air suspension system, larger windows and wider doors. Wheelchair spaces are also provided, although the majority of Metro stations are not yet wheelchair-accessible. In the cabin, the trains also feature more natural lighting, high definition televisions, a new PA system and surveillance cameras.^[51] Improved ventilation is also featured; however, as with Montreal's previous generation rolling stock, cars are not air conditioned. Instead they are equipped with adjustable passenger force ventilation systems which deploy outside air into the train fast to create a cooler environment.^[52]

The MPM-10 uses Alstom OPTONIX IGBT–VVVF traction control assembled in the United States. The MPM-10 Azur can run faster than the maximum speed of the former MR-63, and the current MR-73 trains, they can run as fast as 100 km/h (62.1 mph) due to its enhanced motors. Given the higher capacity of the MPM-10, the trains are heavier than the outgoing MR-63s at 238 t (26.4 t per car).^[53][54][55]

Green Line (since 2017)

Orange Line (since 2016)