Metra Heritage Corridor

Metra Heritage Corridor
Name	Heritage Corridor
Type	Commuter rail
System	Metra
Status	Operating
Locale	Chicago metropolitan area
Start	Union Station (Chicago)
End	Joliet
Owner	Canadian National Railway
Operator	Metra
Line length	37.2 mi
Tracks	1–2
Electrification	None
Map state	collapsed

Metra Heritage Corridor is a commuter rail line in the Chicago metropolitan area operating between Union Station (Chicago) and Joliet via the Alton main line. It provides weekday peak-direction service linking the central business district of Chicago with southwest suburbs and exurban communities, connecting to multiple Chicago Transit Authority lines and numerous Amtrak and freight corridors.

Route description

The line departs Union Station (Chicago) and follows the St. Charles Air Line, crossing the Chicago River before running southwest along tracks formerly associated with the Chicago, Rock Island and Pacific Railroad and Illinois Central Railroad toward Downers Grove and Joliet. Trackage passes through or adjacent to Chicago Loop neighborhoods, the Near West Side, and suburban nodes including LaSalle Street Station environs, skirting industrial districts near McCook and freight yards owned by Canadian National Railway and BNSF Railway. The corridor traverses several historic bridges such as those near Chicago River, crosses the Des Plaines River valley, and runs within sight of landmarks like Midway International Airport and the DuPage County landscape.

Service and operations

Metra schedules for the corridor emphasize rush-hour peak trains, with limited midday and weekend service compared to other Metra lines like the BNSF Railway Line and the Union Pacific West Line. Trains operate primarily in a peak-direction express pattern, utilizing non-electrified diesel locomotives, operating on host freight-owned infrastructure under dispatching agreements with Canadian National Railway. Connections are made at Union Station (Chicago), facilitating transfers to Chicago Transit Authority rapid transit lines including the CTA Blue Line and CTA Red Line, as well as intercity services at Chicago Union Station and regional buses operated by Pace (transit).

Stations

Stations on the corridor include major terminals and suburban stops such as Union Station (Chicago), Glenwood proximate stops, Homewood, Joliet Union Station, and intermediate platforms serving communities like Willow Springs and Downers Grove. Several stations are adjacent to historic districts listed on the National Register of Historic Places, transit centers for Pace (transit), and park-and-ride facilities coordinated with Illinois Department of Transportation. Accessibility features comply with standards promoted by Americans with Disabilities Act of 1990 for commuter rail stations.

Rolling stock and equipment

Rolling stock typically comprises MPI MP36PH-3C and EMD F40PH diesel locomotives mated to stainless-steel gallery cars in Bombardier Transportation and Budd Company designs originally built for various North American commuter services. Cab cars facilitate push-pull operations similar to equipment used on the Metra Electric District and other Metra lines, while older locomotive technology shares lineage with units operated by Amtrak and freight railroads like Norfolk Southern prior to repowering programs. Onboard systems include head-end power supplied by the locomotive, crashworthy structures influenced by Federal Railroad Administration regulations, and communication equipment interoperable with Positive Train Control initiatives.

History

The corridor traces its origins to mid-19th-century charters including the Chicago and Alton Railroad and later consolidations into railroads such as Illinois Central Railroad and Gulf, Mobile and Ohio Railroad. Significant developments included consolidation under Chicago, Rock Island and Pacific Railroad patterns, freight rationalization by Canadian National Railway, and commuter service formation under the regional Northeastern Illinois Regional Transportation Authority and Metra after the 1970s. Key historical moments involved infrastructure upgrades coincident with Interstate Highway System construction impacts, station restorations funded through Federal Transit Administration programs, and service modifications driven by suburbanization trends in Cook County, DuPage County, and Will County.

Ridership and performance

Ridership on the corridor traditionally shows concentrated peak-direction volumes tied to employment centers in Chicago Loop and industrial employment nodes in Joliet. Comparative analyses place its ridership lower than trunk lines such as the Milwaukee District North Line and BNSF Railway Line, with variability due to economic cycles, fuel prices, and regional population shifts tracked by Chicago Metropolitan Agency for Planning. Performance metrics monitored by Metra include on-time performance influenced by freight dispatching priorities belonging to Canadian National Railway and infrastructure constraints where single-track segments limit frequency.

Future plans and upgrades

Planned initiatives include coordination with Metra's Positive Train Control rollout, capital projects funded or proposed through agencies like the Federal Transit Administration and Illinois Department of Transportation, and corridor capacity improvements that might involve additional passing sidings, station accessibility upgrades, and coordination with Chicago Region Environmental and Transportation Efficiency Program objectives. Proposals have explored enhanced weekend service, connections with Southwest Service (Metra) enhancements, and transit-oriented development aligned with Cook County and Will County planning goals to increase multimodal integration with Pace (transit) and Amtrak intercity services.

Category:Metra lines