OC Transpo is the urban transit service of the City of Ottawa, Ontario, Canada. Transit in Ottawa was provided by the Ottawa Transportation Commission until 1973, when transit service in the city and its suburbs was transferred to the auspices of the Regional Municipality of Ottawa-Carleton. Its formal name was the Ottawa-Carleton Regional Transit Commission, but the service would be promoted in both English and French under the OC Transpo name, whose OC initials are derived from Ottawa-Carleton.
