The Indianapolis Public Transportation Corporation, commonly known as IndyGo, operates the public transit system for the City of Indianapolis, Indiana. IndyGo operates 31 fixed routes with about 2,900 stops throughout Indianapolis. The system carries approximately nine million passengers each year. While IndyGo service is focused on Marion County, certain IndyGo fixed routes extend south of the city into Johnson County. Commuter Express routes are also available on a demonstration basis.