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     Purple Line The Central Street station on the Purple Line Overview Type Rapid transit System Chicago 'L' Status Operational Locale Chicago, Evanston and Wilmette, Illinois, USA Termini Linden Howard The Loop (weekday rush hours only) Stations 27 during peak hours, 9 regularly Daily ridership 39,799 (avg. weekday Oct. 2009) Operation Operator(s) Chicago Transit Authority Character Elevated and Grade Level Rolling stock 2400-Series, 2600-Series Technical Line length 15 mi (24 km) Track gauge 4 ft 8 1⁄2 in (1,435 mm) Minimum radius 90 feet (27 m) Electrification Third rail, 600 V DC Route map Linden Central Noyes Foster Davis Dempster Main South Boulevard Howard to loop; weekday rush hours only Sheridan (Cubs games only)     Belmont Wellington Diversey Fullerton Armitage Sedgwick Chicago Merchandise Mart Loop (clockwise) Map Legend Transfer to Brown Line Transfer to Red Line Transfer to Yellow Line ADA accessible station Parking Transfer to Metra Trains The Purple Line of the Chicago Transit Authority is a 3.9-mile (6.3 km) branch line on the northernmost section of the Chicago 'L' rapid transit network. Normally, it extends south from the Wilmette terminal at Linden Avenue, passing through Evanston to Howard Street, on Chicago's northern city limits. Average weekday ridership on the Purple Line was 39,799 as of October 2009.[1] The Purple Line operates weekdays 4 a.m. to 1 a.m., Saturdays 5 a.m. to 2 a.m., and Sundays 6 a.m. to 1 a.m. During weekday rush hours (approximately 6 a.m. to 10 a.m. and 3 p.m. to 7 p.m.), the Purple Line extends another 10.3 miles (16.6 km) south from Howard Street to downtown Chicago running express from Howard Street to Belmont Avenue, and then making all local stops to the Loop. The express service is known as the Purple Line Express, while the Linden-Howard shuttle service is the Purple Line Shuttle.[2] Prior to the color-coding of CTA rail lines in 1993, the Purple Line was known as the Evanston Line, Evanston Service, or Evanston Shuttle, while the Purple Line Express was called the Evanston Express. Many Chicagoans still refer to the Purple Line by these names.[3] The Purple Line is useful for reaching Northwestern University (Davis, Foster, and Noyes stops in Evanston), including the athletic arenas (Central Street), and the Bahá'í House of Worship (Linden stop). The selection of purple as the line's color was likely no accident, as Northwestern's official school color is purple. Contents 1 Operation 1.1 Trackage 1.2 Routing 1.3 Connections 1.4 Operating fleet 2 History 2.1 The Northwestern Elevated era 2.2 CTA era 2.3 Future 3 Destination signs 4 Station listing 5 References 6 External links Operation Trackage Beginning at the Linden Avenue terminal in Wilmette, which contains a small storage yard and car service shop, the Purple Line traverses the North Shore area on private right-of-way which begins at street grade. Running southeasterly from Wilmette, the line rises past Isabella Street on the Wilmette-Evanston border then bridges the North Shore Channel immediately north of Central Street, the first stop in Evanston. The line, now on an elevated embankment, curves southward parallel to Sherman Street. Continuing south, the line enters downtown Evanston and stops at Davis, then curves southeasterly again to parallel Chicago Avenue and Metra's Union Pacific Railroad right-of-way to Clark Street just north of the CTA's Howard Yard facilities. Here the line crosses through the yard area before the junction with the Red Line and the Yellow Line. The tracks are split on grade separated structures to allow Yellow Line trains to enter the junction from the west. Immediately south of the yard lies the Howard Street terminal, where Red, Purple, and Yellow Line trains all terminate. There are four operational tracks starting at the Howard station, continuing on to the Armitage station. During weekday rush hours, the Purple Line runs express on the outermost tracks, skipping all stops until Belmont. At that point the Red and Purple Lines merge into two inner tracks, and meet the Brown Line on the outer local tracks at that point. From Belmont to Merchandise Mart, the Purple Line and Brown Line share the outside tracks and both make all stops along the route. South of Armitage, they are on a two track line on a 4-track structure. The reason the trains share two tracks on a four-track structure is that the exterior tracks deteriorated so much that they were no longer functional, abandoned and no longer necessary once the North Shore Line ceased operations in 1963.[4] Routing Northward view from the Adams/Wabash station at night Chicago Transit Authority control tower 18 elevated Chicago 'L' guides north and southbound Purple and Brown lines intersecting with east and westbound Pink and Green lines and the looping Orange line above the Wells and Lake street intersection in the loop. The original routing of the Purple Line Express was clockwise around the Inner Loop track via Lake-Wabash-Van Buren-Wells, making all Loop stops before returning to Merchandise Mart and making all stops in reverse northbound. Beginning April 2, 2007, the Purple Line Express was rerouted onto the Outer Loop along with the Brown Line due to construction at Belmont and Fullerton stations (see below).[5] Prior to this, Purple Line Express trains were occasionally diverted to the Outer Loop in the event of emergencies or signal problems in the Loop. On December 4, 2008, the CTA announced that Purple Line Express would return to the original Inner Loop routing on December 29.[6] If a problem occurs between the Loop and the Fullerton station, the Purple Line is generally routed into the subway, following the Red Line to the Roosevelt station before returning north.[7] For several years, southbound afternoon Purple Line Express trains stopped at the Addison Red Line station before weekday evening Chicago Cubs baseball games, in order to provide direct service to Wrigley Field for passengers from northern Chicago, Evanston, and Skokie. However, trains had to cross over to the inner Red Line tracks, as there is no platform access to the outer tracks at Addison.[8] As a result of the Brown Line construction and in effort to minimize delays, trains now stop one station north at Sheridan before evening Cubs games. The station was constructed with two island platforms that can access the express tracks, eliminating the need for trains to switch over. Additionally, both northbound and southbound evening rush trains now stop at the station.[9] Connections In its rush hour trip, the Purple Line Express is one of only two 'L' lines to feature transfers to every other line, the other being the Red Line. The Purple Line stations at Davis and Main are immediately to the east of their Metra counterparts, while the Washington/Wells, Quincy, LaSalle/Van Buren, and Randolph/Wabash stations on the express leg are within walking distance of Metra trains at Ogilvie Transportation Center, Union Station, LaSalle Street Station, and Millennium Station, respectively. Operating fleet Currently, the Purple Line is almost entirely operated with Boeing-Vertol-built 2400-Series rail cars.[10] Although the 2400-Series cars were scheduled for retirement in 2010 with the delivery of new Bombardier-built 5000-Series cars, delivery of the 5000-Series cars in large numbers has been delayed to later in 2011. In spring 2007, small numbers of Morrison-Knudsen-built 3200-Series rail cars were transferred to the line,[11] replacing Budd-built 2600-Series rail cars transferred to other assignments. The Purple Line Shuttle usually runs four cars while the Purple Line Express runs six cars, although lengths of trains on the shuttle service can vary due to special circumstances and events. History The Northwestern Elevated era The Evanston Line was placed in operation on May 16, 1908 between Central Street, Evanston and the Loop when the former Northwestern Elevated Railroad extended its mainline service over leased electrified steam railroad trackage owned by the Chicago, Milwaukee, St. Paul and Pacific Railroad.[12] On April 2, 1912, the line reached its present-day terminal at Linden Avenue, Wilmette. The new terminal was established without permission of Wilmette residents, who feared rail service would encourage construction of large apartment buildings in the affluent community.[13] In 1922, the surface level section of the North Side 'L' was elevated onto a concrete embankment structure between Leland Avenue and Howard Street, and was expanded from two to four tracks, thus allowing complete express service from Wilmette and Evanston to downtown Chicago. Several segments of the Evanston Branch itself ran at street level until 1928, when it was elevated onto a concrete embankment between Church Street and the North Shore Channel. It was placed in operation on January 29, 1928.[14] Nine stations existed after Howard, including a station at Calvary. That station was closed in 1931 and replaced by a new station at South Boulevard to the north.[15] CTA era The Brown and Purple Chicago 'L' lines run above vehicular traffic on Franklin Street in the Near North Side community area. The current service which was to become the Purple Line went into effect on July 31, 1949, after a massive service re-orientation on the North-South rapid transit system by the still infant Chicago Transit Authority. Local service was restricted between Linden Avenue and Howard Street, operating at all times. The express service ran weekday rush hours only, stopping at all Evanston stations, Howard, Morse (formerly Rogers Park), Loyola, Wilson, Chicago, Merchandise Mart, and then all Loop stations. While skip-stop service was also introduced at this time, Evanston trains continued to make all stops at their respective stations.[16] An express surcharge was also instituted for customers traveling to and from the Loop past Howard. Several attempts were made to reduce or eliminate the fare, backed by local politicians.[17] Right-of-way and trackage used by the Evanston Branch and the North-South Route (today's Red Line) between Leland Avenue and the Wilmette terminal was purchased by the CTA in 1953 from the Chicago, Milwaukee, St. Paul and Pacific Railroad.[18] In turn, the railroad received $7 million USD in CTA revenue bonds.[19] Midday and Saturday Loop Express service was discontinued in the 1950s and the local shuttle service began using one-man operations with single unit cars in the 1960s. On July 16, 1973, the Isabella station was closed, bringing the total number of stations on the Evanston branch to eight.[20] On November 8, 1973, the third rail system was installed on the Evanston Branch between South Boulevard in Evanston and the Wilmette terminal. Prior to this, Evanston shuttle trains had to be equipped with trolley poles and power collected through overhead catenary wires (similar to the Yellow Line before its conversion to third rail in 2004). The conversion to third rail allowed the CTA to retire the 4000-Series, which were nearly fifty years old, and put newer cars on the line. Since parts of the line are at grade level, some community members initially resisted the conversion and worried the proximity of the rail would be hazardous.[21] By the end of 1976, the additional stops after Howard were eliminated, and the Evanston Express ran nonstop between Howard and Merchandise Mart. The CTA cited complaints about delays in service due to the extra stops as justification for their removal.[22] However, on January 20, 1989, express trains once more began making additional stops outside the Loop, at the Belmont, Fullerton, and Chicago stations, partly in order to relieve overcrowding on the rapidly-growing Ravenswood (later Brown) Line. By the end of the 1990s, trains would make all stops between Belmont and the Loop.[23] The express surcharge was eventually dropped in 1997 as an incentive for customers to use the new TransitCard system.[24] The overnight "owl service" was eliminated during a service purge by the CTA on April 26, 1998.[25] However, the hours of express operation were expanded on December 16, 2001 for a 180-day trial period. Trains departed Linden for downtown one hour earlier in the morning rush and one hour later in the evening rush.[26] The expanded hours were later made permanent and in 2004 afternoon rush service was also revised to begin twenty-five minutes earlier.[27] In 2005, the CTA embarked on a project to replace six deteriorating viaducts on the Evanston branch of the Purple Line. The poor condition of the century-old viaducts forced the implementation of permanent slow zones and were a point of contention for many Evanston politicians. They claimed CTA had secured funds and promised to begin replacing the viaducts starting in 1999, but had diverted the funds to other projects. The CTA responded that it only provided projected uses and had not committed the money to any specific purpose.[28] The Main Street viaduct was completely replaced over the weekend of November 12–13, 2005, requiring the temporary shutdown of the Purple Line. Construction was completed by the Monday morning rush hour.[29] The Church Street viaduct was replaced next; preliminary work at that location began in July 2006[30] and the new viaduct was installed in late October 2006 during another weekend closure of the Purple Line.[31] The Purple Line's Howard terminal underwent a major renovation from 2006 to 2009, during which time it was completely replaced and made ADA-accessible.[32] Major work on the station progressed throughout 2007, causing temporary platform boarding changes, typically on the weekends.[33] The express service has often been targeted for elimination during service purges due to its "auxiliary" nature compared to other CTA rail lines, the rationalization being that there are readily available, albeit slower, alternatives along its entire route. One of the first moves at halting express service came in 1973[34] while one of the most recent was in 2005, when threatened service cuts included the Purple Line Express.[35] The CTA budget crisis continued into 2007, and the Purple Line Express was once again selected as one of several routes to be eliminated if additional funding was not provided. The suggested service cuts would have taken effect September 17, 2007.[36] However, the final plan retained the downtown service, making the stop at the Sheridan station permanent to supplement the Red Line and provide additional capacity on the system following the elimination of thirty-nine bus routes. Express operation would be a day-to-day decision; if the Red Line was deemed too crowded, Purple Line Express trains would make all local stops between Howard and Belmont, resuming the regular route at that station.[37] The service cuts were scheduled to be implemented on September 16, 2007,[38] but the CTA received a last-minute $24 million advance on its 2008 operating subsidy, postponing the changes until November 4, 2007.[39] A last-minute $21 million grant from the governor once again postponed the changes to January 20, 2008,[40] this time including the elimination of forty-two additional routes.[41] However, the Illinois Legislature successfully passed HB656, a transit funding package, on January 17, 2008, providing the CTA with sufficient operating funds and preventing the service cuts.[42] The CTA also embarked on a $530 million USD project to rehabilitate and replace stations and infrastructure along the Brown Line. This project was completed in December 2009.[43] Seven of the stations that were included in the project are shared with the Purple Line, along with the associated trackage[44] and signals[45] from north of the Belmont station to the Loop. Beginning April 2, 2007, operation on the Purple, Brown, and Red Lines between Addison and Armitage was restricted to three tracks, down from the previous four, due to construction at the Fullerton and Belmont stations.[5] Because of this, fewer trains operated to downtown during the rush period in order to prevent a bottleneck. Only every other train was sent to the Loop during rush periods; all other trains operated between Linden and Howard only.[46] Full service has since been restored.[47] In addition, the Purple Line Express routing was changed to the Outer Loop, rather than along the Inner Loop, in order to provide riders more options for accessing stations between Belmont and the Loop. This line was returned to the Inner Loop in Spring 2009.[5] Future One form of the CTA's "Circle Line" plan would call for a rerouting of the Purple Line Express service. Rather than continue to the Loop along with the Brown Line, trains would follow the Red Line after Belmont, making a stop at Fullerton and all current Red Line subway stops and terminate at a new station on Wentworth before heading north. However, this is merely a study and the final form of the Circle Line and its effects on current CTA rail service, if the project begins at all, remain to be seen.[48] Destination signs These are the destination signs used by the Purple Line since 1993, when they began displaying the route name on the line color background.[49] Linden destination sign. Howard destination sign, used on southbound shuttle trains terminating at Howard. Loop destination sign, used on southbound Purple Line Express trains. Station listing Chicago Transit Authority Chicago 'L' route map Purple Line Shuttle (Evanston branch) Station Location Points of interest and notes Linden 349 Linden Avenue, Wilmette Bahá'í House of Worship Wilmette Isabella 1215 Isabella Street, Evanston Closed July 16, 1973 Central 1022 Central Street, Evanston Northwestern University Ryan Field, Evanston Hospital, Grosse Point Lighthouse, Evanston Art Center Noyes 901 Noyes Avenue, Evanston Northwestern University, north campus, Noyes Cultural Arts Center, Evanston Civic Center Foster 900 Foster Street, Evanston Northwestern University, south campus Davis 1612 Benson Street, Evanston Downtown Evanston, Transfer station for Metra Union Pacific North Line Dempster 1316 Sherman Avenue, Evanston Dempster Beach, Charles Gates Dawes House Museum Main 836 Chicago Avenue, Evanston Transfer station for Metra Union Pacific North Line South Boulevard 601 South Boulevard, Evanston Saint Francis Hospital, Calvary Cemetery Calvary 400 Chicago Avenue, Evanston Closed 1931; replaced by South Boulevard Howard 1649 W. Howard Street, Chicago Terminal during non-rush hours Transfer station for Red and Yellow Lines Purple Line Express (weekday rush hours only) Sheridan 3940 N. Sheridan Road, Chicago Alternate for Wrigley Field until at least 2009; only served by Purple Line Express trains before Chicago Cubs weekday night games Belmont 945 W. Belmont Avenue, Chicago Lakeview, Briar Street Theatre Boystown, The Vic Theatre Transfer station for Red and Brown Lines Wellington 945 W. Wellington Avenue, Chicago Illinois Masonic Medical Center Diversey 943 W. Diversey Avenue, Chicago Lincoln Park, Elks National Memorial Headquarters Building Fullerton 943 W. Fullerton Avenue, Chicago Lincoln Park, Children's Memorial Hospital, St. Josaphat Roman Catholic Church, DePaul University, Biograph Theater Transfer station for Red and Brown Lines Armitage 944 W. Armitage Avenue, Chicago Goose Island Brewery, Lincoln Park Zoo Sedgwick 1536 N. Sedgwick Street, Chicago The Second City, Chicago History Museum, Old Town, Piper's Alley, North Avenue Beach Chicago 301 W. Chicago Avenue, Chicago Moody Bible Institute, Cabrini–Green, River North Gallery District Merchandise Mart 350 N. Wells Street, Chicago Merchandise Mart Transfer station for Brown Line Clark/Lake 100 W. Lake Street, Chicago James R. Thompson Center, Richard J. Daley Center Transfer station for Orange, Green, Blue, Brown, and Pink Lines State/Lake 200 N. State Street, Chicago Chicago Theatre, Gene Siskel Film Center Transfer station for Red Line via Lake Randolph/Wabash 151 N. Wabash Avenue, Chicago Marshall Field's State Street store (now Macy's), Chicago Cultural Center, Millennium Park Transfer station for Metra (Metra Electric Line) and South Shore Line trains Madison/Wabash 2 N. Wabash Avenue, Chicago Jewelers Row Adams/Wabash 201 S. Wabash Avenue, Chicago Grant Park, Petrillo Music Shell, Buckingham Fountain, Art Institute of Chicago, Orchestra Hall, DePaul University Transfer station for Orange, Green, Brown, and Pink Lines Harold Washington Library-State/Van Buren 1 W. Van Buren Street, Chicago Harold Washington Library Center, DePaul University, Robert Morris University, John Marshall Law School, Chicago Bar Association and The Auditorium Building of Roosevelt University Transfer station for Orange, Brown, and Pink Lines and Red Line via Jackson/State and Blue Line via Jackson/Dearborn LaSalle/Van Buren 121 W. Van Buren Street, Chicago Chicago Board of Trade, Chicago Board Options Exchange, LaSalle Street Station Transfer station for Metra trains (Rock Island District) Quincy 220 S. Wells Street, Chicago Sears Tower, Union Station Transfer station for Metra (BNSF Railway Line, Heritage Corridor, Milwaukee District/North Line, Milwaukee District/West Line, North Central Service, SouthWest Service) and Amtrak trains Washington/Wells 100 N. Wells Street, Chicago Chicago City Hall, Civic Opera House, Chicago Mercantile Exchange, Ogilvie Transportation Center Transfer station for Orange, Brown, and Pink Lines and Metra trains (Union Pacific/North Line, Union Pacific/Northwest Line, Union Pacific/West Line) At Washington/Wells, Purple Line Express trains return to Merchandise Mart and make all stops in reverse to Linden. References ^ http://www.transitchicago.com/assets/1/ridership_reports/2009-10.pdf Monthly Ridership Report October 2009 ^ Train Schedules. Chicago Transit Authority. Retrieved on 2006-09-23. ^ Purple Line. Chicago "L".org. Retrieved on 2006-09-23. ^ Armitage Tower. Chicago "L".org. Retrieved on 2007-08-08. ^ a b c CTA Outlines Plans for Three-Track Operation This Spring. Chicago Transit Authority. 2007-01-10. Retrieved on 2007-01-11. ^ Purple Express Trains to Resume Operating on Inner Loop Track December 29. Chicago Transit Authority. 2008-12-04. Retrieved on 2008-12-05. ^ Rail Service Disruptions Result of Three Unrelated Occurrences. Chicago Transit Authority. 2006-09-28. Retrieved on 2006-12-04. ^ CTA Best Choice for Baseball Fans Traveling to U.S. Cellular and Wrigley Field this Baseball Season. Chicago Transit Authority. 2006-03-21. Retrieved on 2007-01-11. ^ CTA Provides Service to Wrigley Field This Baseball Season. Chicago Transit Authority. 2007-04-05. Retrieved on 2007-05-21. ^ CTA Car Assignments. Chicago "L".org. Retrieved on 2007-09-16. ^ 3200-series cars at Linden. Flickr. 2007-07-29. Retrieved on 2007-07-30. ^ Borzo, Greg (2007). The Chicago "L". Arcadia Publishing, p. 80. ISBN 0738551007. ^ Borzo, Greg (2007). The Chicago "L". Arcadia Publishing, p. 81. ISBN 0738551007. ^ Borzo, Greg (2007). The Chicago "L". Arcadia Publishing, p. 84. ISBN 0738551007. ^ Calvary. Chicago "L".org. Retrieved on 2006-09-23. ^ "CTA will start new skip-stop service on 'L'; north and south routes affected in plan." Chicago Daily Tribune. 1949-06-30. ^ "CTA passes up cut in express 'L' train fare." Chicago Daily Tribune. 1957-09-06. ^ "CTA will buy 'L' segment and asks bond bids." Chicago Daily Tribune. 1953-10-10. ^ "Rail buys CTA bonds, sells 'L' right of way." Chicago Daily Tribune. 1953-10-17. ^ Isabella. Chicago "L".org. Retrieved on 2006-09-23. ^ "Residents hit CTA hot rail plan." Connie Lauerman. Chicago Tribune. 1973-06-07. ^ "Express 'L' ends stops at 2 stations." Chicago Tribune. 1976-12-09. ^ "Evanston Express adds stops Jan. 20." Chicago Tribune. 1988-11-04. ^ "CTA to drop surcharge with use of new transit card." Jon Hilkevitch. Chicago Tribune. 1997-06-12. ^ "CTA to begin latest cutbacks, reducing its late-night service." Chicago Tribune. 1998-04-26. ^ The CTA announces bus and rail service improvements. Chicago Transit Authority. 2001-10-03. Retrieved on 2006-09-23. ^ CTA announces additional rail service improvements. Chicago Transit Authority. 2004-01-22. Retrieved on 2006-09-23. ^ "Legislators snub CTA over Evanston repairs; rebuilding sought of 6 old viaducts." Courtney Flynn. Chicago Tribune. 2003-06-20. ^ CTA to Install New Steel Viaduct at Main Street this Weekend. Chicago Transit Authority. 2005-11-11. Retrieved on 2006-09-23. ^ CTA Field Work Begins to Replace Church Street Viaduct. Chicago Transit Authority. 2006-07-06. Retrieved on 2006-09-23. ^ CTA to Install New Steel Viaduct at Church Street this Weekend. Chicago Transit Authority. 2006-10-26. Retrieved on 2006-12-04. ^ "Opening of Auxiliary Entrance at Howard Station Completes Station Renovations". CTA website. Chicago Transit Authority. http://www.transitchicago.com/news/default.aspx?Archive=y&ArticleId=2307. Retrieved August 23, 2010.  ^ Howard Station Rehabilitation Construction Work. Chicago Transit Authority. 2007-09-14. Retrieved on 2007-09-16. ^ "CTA cuts 18 bus routes, 23 'L' stations." Tom Buck, Edward Schreiber. Chicago Tribune. 1973-01-16. ^ Chicago Transit Board Selects Reduced Service Plan. Chicago Transit Authority. 2005-04-13 Retrieved on 2006-09-23. ^ CTA Outlines Contingency Plan. Chicago Transit Authority. 2007-05-24. Retrieved on 2007-07-30. ^ Service Reductions and Fare Increases Effective September 16, 2007. Chicago Transit Authority. 2007-09-03 Retrieved on 2007-09-15. ^ CTA Board Approves Modified Contingency Plan. Chicago Transit Authority. 2007-08-08. Retrieved on 2007-08-08. ^ CTA Statement on Postponing Service Reductions and Fare Increases. Chicago Transit Authority. 2007-09-14 Retrieved on 2007-09-15. ^ CTA Postpones Service Cuts, Fare Increases and Employee Layoffs Scheduled for November 4. Chicago Transit Authority. 2007-11-02 Retrieved on 2008-02-27. ^ Service Reductions and Fare Increases due to Insufficient State Funding. Chicago Transit Authority. 2008-01-07 Retrieved on 2008-02-27. ^ CTA Statement Regarding Passage of Transit Funding Legislation. Chicago Transit Authority. 2008-01-17 Retrieved on 2008-02-27. ^ Countdown to a New Brown: The Brown Line Capacity Expansion Project. Chicago Transit Authority. Retrieved on 2010-11-19. ^ Countdown to a New Brown: The Brown Line Capacity Expansion Project. Chicago Transit Authority. Retrieved on 2006-12-04. ^ CTA Track and Signal Renewal Project to Upgrade Red and Brown Line Junction. Chicago Transit Authority. 2006-05-01. Retrieved on 2006-12-04. ^ Linden Purple Line Timetable. Chicago Transit Authority. 2007-03-02. Retrieved on 2007-07-30. ^ Linden Purple Line Timetable. Chicago Transit Authority. 2010-02-07. Retrieved on 2010-11-19. ^ Loop the Loop - Proposal for new Circle Line. Chicago Transit Authority. Retrieved on 2006-09-23. ^ Train Destination Signs. Chicago "L".org. Retrieved on 2006-12-04. External links Purple Line at Chicago-'L'.org Train schedules at CTA official site v · d · eChicago 'L' Lines      Red Line ·      Orange Line ·      Yellow Line ·      Green Line ·      Blue Line ·      Purple Line ·      Brown Line ·      Pink Line · Loop Defunct lines Stock Yards  · Kenwood  · Normal Park  · Market Street  · Metropolitan Main Line  · Garfield Park  · Westchester  · Humboldt Park  · Northwest  · Randolph Street  · Cuyler Stations Current stations · Former stations Rolling stock Defunct: 4000  · 5000  · 6000  · 1-50  · 2000 Current: 2200  · 2400  · 2600  · 3200  · 5000 Operators Current: Chicago Transit Authority Former: Chicago Rapid Transit Company  · South Side Elevated Railroad  · Lake Street Elevated Railroad  · Metropolitan West Side Elevated Railroad  · Northwestern Elevated Railroad Other Chicago Central Area Transit Plan · CTA Holiday Train · Mid-City Transitway  · 1977 Chicago Loop derailment