The success of the Metro increased the pressure to extend the network to other populated areas, including the suburbs on the Island of Montreal.
After being awarded, in May 1970, the 1976 Summer Olympics, a loan of $430 million ($2.7 billion in 2016) was approved by the MUC on February 12, 1971 to fund the extensions of Line 1 (Green Line) and Line 2 (Orange Line) and the construction of a transverse line: Line 5 (Blue Line).
The Government of Quebec agreed to bear 60% of the costs.

The work on the extensions started October 14, 1971 with Line 1 (Green Line) towards the east to reach the site where the Olympic Stadium was to be built and Autoroute 25 (Honoré-Beaugrand station) that could serve as a transfer point for visitors arriving from outside.
The extensions were an opportunity to make improvements to the network, such as new trains, larger stations and even semi-automatic control.
The first extension was completed in June 1976 just before the Olympics.
Line 1 (Green Line)   was later extended to the southwest to reach the suburbs of Verdun and LaSalle with the Angrignon as the terminus station, named after the park and zoo.
This station opened in September 1978.

In the process, further extensions were planned and in 1975 spending was expected to reach reached $1.6 billion ($7.3 billion in 2016).
Faced with these soaring costs, the Government of Quebec declared a moratorium May 19, 1976 to the all-out expansion desired by Mayor Jean Drapeau.
Tenders were frozen, including those of Line 2 (Orange Line) after the Snowdon station and those of Line 5 (Blue Line) whose works were yet already underway.
A struggle then ensued between the MUC and the Government of Quebec as any extension could not be done without the agreement of both parties.
The Montreal Transportation Office may have tried to put the government in front of a fait accompli by awarding large contracts to build the tunnel between Namur station and the Bois-Franc station just before the moratorium was in force.
The success of the Metro increased the pressure to extend the network to other populated areas, including the suburbs on the Island of Montreal. After being awarded, in May 1970, the 1976 Summer Olympics, a loan of $430 million ($2.7 billion in 2016) was approved by the MUC on February 12, 1971 to fund the extensions of Line 1 (Green Line) and Line 2 (Orange Line) and the construction of a transverse line: Line 5 (Blue Line). The Government of Quebec agreed to bear 60% of the costs.
The work on the extensions started October 14, 1971 with Line 1 (Green Line) towards the east to reach the site where the Olympic Stadium was to be built and Autoroute 25 (Honoré-Beaugrand station) that could serve as a transfer point for visitors arriving from outside. The extensions were an opportunity to make improvements to the network, such as new trains, larger stations and even semi-automatic control. The first extension was completed in June 1976 just before the Olympics. Line 1 (Green Line)   was later extended to the southwest to reach the suburbs of Verdun and LaSalle with the Angrignon as the terminus station, named after the park and zoo. This station opened in September 1978.
In the process, further extensions were planned and in 1975 spending was expected to reach reached $1.6 billion ($7.3 billion in 2016). Faced with these soaring costs, the Government of Quebec declared a moratorium May 19, 1976 to the all-out expansion desired by Mayor Jean Drapeau. Tenders were frozen, including those of Line 2 (Orange Line) after the Snowdon station and those of Line 5 (Blue Line) whose works were yet already underway. A struggle then ensued between the MUC and the Government of Quebec as any extension could not be done without the agreement of both parties. The Montreal Transportation Office may have tried to put the government in front of a fait accompli by awarding large contracts to build the tunnel between Namur station and the Bois-Franc station just before the moratorium was in force.
Montreal Metro