The mission of the Société de transport de l'Outaouais is to provide residents of the municipalities in its area, which includes the Gatineau urban area as well as Cantley and Chelsea, with a reliable public transit system that meets their needs at a reasonable cost for users, taxpayers and these municipalities.

Consequently, the STO places its emphasis on staying in tune with its environment, ensuring responsible leadership for public transit, and playing an active role in upholding and promoting the image of the Outaouais region through local development, growth and protection of the environment.

The success of this mission depends greatly on the concerted effort of elected officials and STO employees, whose support in reaching corporate goals is essential.

The STO is, above all, more than 600 employees who do their utmost to provide a quality service for inhabitants of the Outaouais.