I am familiar with Trois-Rivières, the people who lead it and the bus fleet. In the case of Trois-Rivières, I don't think bus rapid transit would be a good solution, because the city doesn't have the population density. I think work should focus more on vehicles and emissions as such.
Furthermore, some of the characteristics of bus rapid transit could be used to improve the average speed of buses, for example, the preemption of traffic lights, lights that change when the bus needs to go through, systems for people to get on and off the bus quickly, and payment outside the bus rather than lining up to get on.
Consequently, bus rapid transit is part of the solution. All of these advantages allow for a decrease in consumption and emissions.