The South Shore Line is an electrically powered interurban commuter rail line operated by the Northern Indiana Commuter Transportation District (NICTD) between Millennium Station in downtown Chicago and the South Bend International Airport in South Bend, Indiana. The name refers to both the physical line and the service operated over that route. The line was built in 1901–1908 by predecessors of the Chicago South Shore and South Bend Railroad, which continues to operate freight service. Passenger operation was assumed by the NICTD in 1989.