MR-90

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MR-90
An MR-90 at Deux-Montagnes in 2005.
Stock type	Electric multiple unit
In service	1995–2020
Manufacturer	Bombardier Transportation
Built at	La Pocatière
Replaced	CN Boxcab Electric, CN electric multiple unit
Constructed	1994 - 1995
Entered service	1995
Scrapped	2022 - 2023
Number built	58
Number preserved	2
Number scrapped	56
Fleet numbers	Motor: 400-456 (even) Trailer: 401-449 (odd) Trailer with cab: 481-487 (odd)
Operators	Exo
Depots	St-Eustache
Lines served	Deux-Montagnes (Exo)
Specifications
Train length	One married pair, 52.02 m (170 ft 8 in) over couplers (length over coupler pulling faces) Maximum 5 married pairs, 260.1 m (853 ft 4 in) over couplers
Car length	26.01 m (85 ft 4 in) over Type H coupler and to half way of drawbar
Wheel diameter	864 mm (34 in)
Wheelbase	2,642 mm (8 ft 8 in) (truck) 18,136 mm or 59 ft 6 in truck centers
Maximum speed	120 km/h (75 mph) (design) 109 km/h (68 mph) (service)
Weight	Motor: 57,169 kg (126,036 lb) Trailer: 44,465 kg (98,029 lb) Trailer with cab: 45,372 kg (100,028 lb)
Traction motors	Siemens AC (4 × 284 kW (381 hp) / motor car)
Power output	1,350 kW (1,810 hp)[1]
Tractive effort	100 kN (22,000 lbf) @48 km/h (30 mph)[1]
Acceleration	2.4 km/(h⋅s) or 1.5 mph/s
Deceleration	3.2 km/(h⋅s) or 2.0 mph/s emergency: 4 km/(h⋅s) or 2.5 mph/s
Auxiliaries	700 V AC / one phase / 60 Hz
Power supply	480 V AC / three phase 60 Hz 120 V AC / 60 Hz 37.5 V DC Battery voltage
Electric system(s)	25 kV AC 60 Hz catenary
Current collector(s)	Pantograph
Bogies	2
Braking system(s)	Air
Track gauge	1,435 mm (4 ft 8+1⁄2 in) standard gauge

The MR-90 was a class of single-level electric multiple unit (EMU) railcars built in 1994-1995 by Bombardier Transportation for the Société de Transport de la Communauté Urbaine de Montreal (STCUM) and last operated by Exo. These cars were ordered when the Deux-Montagnes line was completely rebuilt from 1993 to 1995 and all the equipment and infrastructure was replaced.

With the closure of the Deux-Montagnes line on December 31, 2020 in favour of the Réseau express métropolitain project, the MR-90 fleet was withdrawn from service. They were subsequently transported to Exo's Pointe-Saint-Charles maintenance center for storage. A request for information has been issued to determine the fate of the cars.^[2] In 2022, exo announced that the MR-90 coaches would be scrapped.^[3] A single married pair, composed of Motor car number 400 and trailer with cab number 485, was set aside for preservation at the Canadian Railway Museum in Saint-Constant.^[4]