Regional Transportation Authority (Illinois) Tags: Public Transit System.The Regional Transportation Authority (RTA) is the financial and oversight body for the three transit agencies in northeastern Illinois; the Chicago Transit Authority (CTA) Metra and Pace which are called Service Boards in the RTA Act. headquarter Chicago, Illinois location Chicago metropolitan area number of vehicles 5234 opening year 1974-01-01T00:00:00+02:00 operated by Chicago Transit Authority, Metra, Pace (transit) passengers per day 2000000 type Bus, Commuter rail, Rapid transit Learn more... Loading...