Listed in this page are only the dates which those routes existed as Through Routes. More detailed route histories are available at the other pages in this section.
Unless noted, all extension or replacement bus routes were operated by the same companies which had introduced the streetcar routes. In 1908, Calumet Electric Street Railway and South Chicago City Railway merged to form Calumet & South Chicago Railway. Prior to the formation of CTA, Chicago Railways was the only company operating trolleybuses.
9/30/12 - Through Route streetcar introduced
10/7/46 - Through Route discontinued
Used 55th St. branch of Cottage Grove route, operated north via Broadway. After discontinuance of route, certain route 4 streetcars continued to serve 55th St. branch during rush hours until 8/1/47.
6/6/10 - Through Route streetcar introduced
9/13/24 - Through Route discontinued
10/5/12 - Through Route streetcar introduced
3/11/51 - Through Route discontinued
2/1/14 - Through Route streetcar introduced between downtown and 119th/Morgan
8/12/18 - Through Route revised to operate to 115th/Cottage Grove.
6/19/55 - streetcar route converted to buses
Original Through Route used Michigan Ave. south of 95th St., shifted to Cottage Grove effective 8/12/18.
2/23/13 - Through Route streetcar introduced between downtown and 92nd/Commercial
4/10/27 - extended south primarily via Ewing to 108th St., replacing portion of route 24
7/14/47 - Ewing extension discontinued as redundant to route 30
12/4/49 - Through Route discontinued
When discontinued, service on South Chicago Ave. had coexisted for 2 years with bus route 25 (now 30).
1/18/12 - Through Route streetcar introduced
9/13/24 - Through Route discontinued
10/9/11 - Through Route streetcar introduced
9/13/24 - Through Route discontinued
12/13/11 - first Through Route streetcar introduced, serving 63rd St. at south end
7/16/12 - original Through Route discontinued
1912 - some service extended south of 79th St. over what now is route 112
12/4/49 - segment south of 79th St. transferred to route 111A Vincennes-111th
11/25/51 - buses substituted on weekends
5/29/54 - streetcar route converted to buses
Various Through Route combinations existed throughout the early history of this route. Original Through Route operated between Grace/Halsted and 63rd/Stony Island via Halsted and 63rd St. Beginning in 1912, some Halsted service, mainly route 42 Halsted-Downtown service, began operating south of 79th St. via Vincennes and 111th St. to Sacramento, over what now is the 112 route. While for most of through service continuing north on Halsted, the south terminal remained 79th St. Effective 5/24/31, the through Halsted service generally turned around at 111th/Sacramento, with the downtown service generally turning at 79th St. Through service south of 79th St. discontinued 12/4/49, when segment south of 79th St. was converted to buses.
9/4/08 - Through Route streetcar introduced
5/11/52 - buses substituted on weekends
2/13/54 - streetcar route converted to buses
Until 8/21/36, streetcars operated north of Cortland via Southport instead of Ashland. On that date, the through streetcar route via Ashland was finally completed.
9/5/11 - Through Route streetcar introduced
8/1/48 - south and north ends converted to buses, transferred to routes 49A and 49B
Route split into the present three separate routes 8/1/48, when buses replaced streetcars on south segment (route 49A) and on north segment (route 49B). Remaining streetcar service on middle segment numbered route 49.
10/26/11 - Through Route streetcar introduced
9/14/24 - Through Route discontinued
6/26/11 - Through Route streetcar introduced
9/14/24 - Through Route discontinued
12/13/11 - Through Route streetcar introduced
9/14/24 - Through Route discontinued
Operated between Waveland/Halsted and Cicero/Archer.
6/26/11 - Through Route streetcar introduced
9/14/24 - Through Route discontinued
Operated between Kenton/Roosevelt and Diversey/Clark.
12/27/09 - Through Route streetcar introduced
8/15/12 - Through Route discontinued
Operated between Marshall/21st and Diversey/Clark.
1912 - Through Route streetcar introduced between downtown and Austin Blvd.
9/14/24 - Through Route adopted via State St. to 119th/Morgan
10/7/46 - Through Route discontinued on State St.
5/30/54 - streetcar route converted to buses
10/5/97 - discontinued
2/1/11 - Through Route streetcar introduced
12/4/49 - Through Route discontinued
Similar to route 52, except included extension on Kedzie north from Milwaukee Ave., opening 2/7/13 and eventually reaching Bryn Mawr. Streetcar extension eliminated, replaced 12/4/49 by extending Homan bus route 82A further north. North Kedzie service eventually became route 89.
1/3/10 - Through Route streetcar introduced
7/3/33 - Through Route discontinued
Operated between Waveland/Halsted and Austin/Madison.
1/18/12 - Through Route streetcar introduced
9/15/12 - Through Route discontinued
Operated between Austin/Chicago and 63rd/State.
12/27/10 - Through Route streetcar introduced between downtown and Austin Blvd.
5/11/52 - buses substituted on weekends
12/13/53 - streetcar route converted to buses
6/26/11 - Through Route streetcar introduced
8/15/12 - Through Route discontinued
Operated between between Cicero/North and downtown via Milwaukee Ave.
3/17/08 - Through Route streetcar introduced
9/5/54 - buses substituted on weekends
9/7/57 - streetcar route on Clark converted to buses, Through Route discontinued
When streetcar route on Clark was converted to buses, remaining streetcar service on Wentworth was renumbered 22A. That was Chicago's last streetcar route, converted to buses 6/21/58. Effective 2/15/76, route 22A was renumbered 24.
12/1/12 - Through Route streetcar introduced, combining Erie and Racine routes
7/25/48 - streetcar route converted to buses
9/13/81 - discontinued