The New Haven Division of Connecticut Transit (CT Transit), the state's bus system, is the second largest division in the state with 24 routes. All routes originate from the New Haven Green, making it the central transfer hub of the city. Service is provided to 19 different municipalities throughout Greater New Haven. Bus routes were formerly identified by letters, but as of October 8, 2017, all service was renamed using 200-series numbers, in accordance with a renumbering of CTtransit's statewide services.