Chicago Transit Authority
The Chicago Transit Authority (CTA) operates the nation's second largest public transportation system and covers the City of Chicago and 35 surrounding suburbs. On an average weekday, approximately 1.6 million rides are taken on the CTA.
The CTA is an independent governmental agency created by state legislation. It began operating on October 1, 1947, after acquiring the properties of the Chicago Rapid Transit Company and the Chicago Surface Lines. On October 1, 1952, CTA became the sole operator of Chicago transit when it purchased the Chicago Motor Coach system.