Joliet Gateway Center is the terminus of the Metra
Rock Island District and
Heritage Corridor lines, to
Chicago LaSalle Street Station and
Chicago Union Station respectively. It is an intermediate stop on the Amtrak
Texas Eagle from Chicago Union to
San Antonio and
Los Angeles, and on the
Lincoln Service from Chicago to
St. Louis and
Kansas City. , Joliet is the 51st busiest of Metra's 236 non-downtown stations, with an average of 996 weekday boardings. , Joliet is served by 42 Rock Island District trains (21 in each direction) on weekdays, 21 trains (ten inbound, eleven outbound) on Saturdays, and 16 trains (eight in each direction) on Sundays and holidays. On weekdays, the station is also served by three inbound Heritage Corridor trains in the morning and three outbound trains in the evening. For Amtrak, as of 2024, Joliet is served by eight
Lincoln Service trains (four in each direction) and two
Texas Eagle trains (one in each direction), every day. The Joliet Gateway Center is from
Chicago Union Station on Metra's
Heritage Corridor, and from Chicago's
LaSalle Street Station on the
Rock Island District. It is the only Metra station outside of its Chicago stations where two lines terminate. In Metra's zone-based fare system, Joliet is in zone 4 on both lines.
Future services Amtrak announced a proposal to improve its
Texas Eagle and
Lincoln Service trains in 2022. The Amtrak trains, along with the Metra Heritage Corridor, currently use the
CN Joliet Subdivision from Joliet to Chicago. Train traffic on the Joliet Subdivision causes frequent delays to Amtrak trains, and Amtrak proposed to reroute the
Texas Eagle and
Lincoln Service over the Rock Island District. Metra owns and manages the Rock Island District, and it sees little freight traffic, making it an attractive route for Amtrak. To operate Amtrak trains over the Rock Island District, modifications would be required in Joliet and Chicago. A third platform would need to be constructed at Joliet Gateway Center, and Amtrak would need to improve the connection between the Rock Island District and Chicago Union Station. The current connection from the Rock Island District to Union Station via the
St. Charles Air Line sees occasional use during maintenance and emergencies, but it limits trains to a maximum speed of and requires trains to reverse into Union Station. ==Connections==