The Chicago Transit Authority (CTA) is an independent governmental agency created by state legislation. The CTA began operating on October 1, 1947, after it acquired 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. The CTA operates the nation's second largest public transportation system and covers the City of Chicago and 40 surrounding suburbs. On an average weekday, 1.5 million rides are taken on the CTA.