MONTREAL — In the next four years, Montreal transit leaders will spend more money on infrastructure than they have in the past decade. In 2016, Societe de transport de Montreal, the region’s rail transit operator, invested more than a $500 million dollars in infrastructure. The investment is a broader objective that will invest another $4.5 billion between now and 2020.

In investing more money in its infrastructure, the agency is able to address its multi-billion dollar asset maintenance deficit. During 2016’s investment of $550 million, the agency was able to reduce that deficit from $4.3 billion to $3.8 billion.

Some of the investments include purchases of new railcars, including a fleet of more than 400 Bombardier-Alstom Azur metro passenger cars, and upgrades to station facilities and wayside infrastructure that help cut down on maintenance costs.

The agency operates four subway lines that serve more than 60 stations throughout Montreal.