The BNSF Railway Line is a commuter rail line in the United States

United States

The United States of America is a federal constitutional republic comprising fifty states and a federal district...

, provided by Metra

Metra

Metra is the commuter rail division of the Illinois Regional Transportation Authority. The system serves Chicago and its metropolitan area through 240 stations on 11 different rail lines. Throughout the 21st century, Metra has been the second busiest commuter rail system in the United States by...

 and operated by the BNSF Railway

BNSF Railway

The BNSF Railway is a wholly owned subsidiary of Berkshire Hathaway Inc., and is headquartered in Fort Worth, Texas. It is one of seven North American Class I railroads and the second largest freight railroad network in North America, second only to the Union Pacific Railroad, its primary...

 in Chicago

Chicago

Chicago is the largest city in the US state of Illinois. With nearly 2.7 million residents, it is the most populous city in the Midwestern United States and the third most populous in the US, after New York City and Los Angeles...

 and its surrounding suburbs. While Metra does not specifically refer to any of its lines by a particular color, the timetable accents for the BNSF line are printed in bright "Cascade Green," similar to the paint of the Burlington Northern Railroad

Burlington Northern Railroad

The Burlington Northern Railroad was a United States-based railroad company formed from a merger of four major U.S. railroads. Burlington Northern operated between 1970 and 1996....

.

Its eastern terminus is the Union Station

Union Station (Chicago)

Union Station is a major train station that opened in 1925 in Chicago, replacing an earlier 1881 station. It is now the only intercity rail terminal in Chicago, as well as being the city's primary terminal for commuter trains. The station stands on the west side of the Chicago River between Adams...

 in downtown Chicago.