MR-73

Contract award

Mayor of Montreal Jean Drapeau suggested to snowmobile manufacturer Bombardier that they should bid on the contract.^[2] Although the design of what was to later become the MR-73 was completed in 1973, it was only in 1974 that the CTCUM formally awarded the MR-73 contract to the fledgling Bombardier Transportation.^[3] A cheaper bid by Canadian Vickers, manufacturer of the MR-63 trains, was disqualified by a technicality.^[2][4]

Construction and entry into service

Bombardier had never manufactured a Metro train in Canada, and assistance was sought from SOFRETU, the French consultants who helped design the Metro, as well as from an Austrian subsidiary of Bombardier that previously manufactured trams.^[4]

The 423 MR-73 cars were manufactured at Bombardier's La Pocatière plant between 1974 and 1980 and the first units entered service in 1976. The MR-73's original interior featured orange-and-white seats arranged so that in each third of the train, there were two double sets of transverse seating and four single seats near the doors in longitudinal formation.^[5][6]

Automated announcements and visual information

In the early 1990s, Alstom Télécité LED visual information screens were added on top of alternating side windows in all MR-73 cars.^[7][8][9]

Advertisements were displayed, along with information on the weather and upcoming stations. Around the same time, automated next-station announcements were introduced on the MR-73 and voiced by Judith Ouimet.^[10][11]

Interior refurbishment

In December 2005, work began to refurbish the now 30 year old trains. The trains were still very reliable, with a Mean Distance Between Failures (MDBF) exceeding 200,000 mi (322,000 km) in 2004.^[12]

The MR-73 fleet underwent a $40 million refurbishment to reconfigure interior seating to increase total car capacity and install new poles and new panels with a new ergonomic colour scheme that discouraged vandalism, decreased motion sickness, and promoted aesthetic harmony. Seating capacity was reduced by six per carriage, increasing standing room.^[13] The refurbishment also include an ergonomic full-spectrum lighting system that provides therapeutic anti-depression effects for its passengers. Like the older MR-63 fleet, the MR-73 driver cabs was modernized and equipped with ergonomic features and digital dashboards. Work was completed in 2008.^[14]

Closing doors chime

In 2006, an MR-73 train was tested with a four-beep door chime,^[15] and in 2008, another high-pitched chime was tested.^[16] However, the new chimes were unpopular and so in 2010, a three-note sequence that is essentially replicating the last three audible notes from the electric chopper control traction system was tested, along with a voiceover by Michèle Deslauriers saying Attention, nous fermons les portes (Attention, we are closing the doors) after the three-note sound was played.^[17][18][19] The voiceover portion was soon removed, however,^[20] and since 2012, the MR-73s play the three-note sequence whenever the doors are about to close.

Retirement and replacement

The STM noted in 2014 that they planned for the fleet to remain in service until at least 2036.^[21][12]

The less reliable cars have been retired, with 63 cars scrapped from June 2021 to make room for the MPM-10 Azur.^[22] In June 2021, the first car of the series, 79-501, was returned to the La Pocatière plant, now owned by Bombardier's successor Alstom.^[23][14]

In 2022, STM announced they planned to replace the trains in the 2030s, with work underway to purchase new trains. This was estimated to cost around $2.9bn.^[24] The STM also noted that to increase the capacity of the Green Line by 37%, works to upgrade garages and signalling systems would be required as well as new rolling stock.^[25]