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The Proposed expansion of the Chicago "L", generally referred to as the Chicago Central Area Transit Project (CCATP) in the 1970s, was an extensive study of the rapid transit system in downtown Chicago; the study had begun in 1965. In April 1968, the completed study resulted in a three-volume report that proposed a series of recommendations for redeveloping and expanding Central Area communities, and for the replacement of The Loop elevated rapid transit system with a new loop subway under Randolph, Franklin, Van Buren, and Wabash, and a new distributor subway system in downtown Chicago (see Chicago "L").

References

City of Chicago (Ill.), Department of Public Works. Chicago Transit Authority. "Transit Planning Study Chicago Central Area (P-ILL. 3254)." 1968. Chicago. Volume I. Print.

City of Chicago (Ill.). Chicago Urban Transportation District. "Chicago-Franklin Line Rail Rapid Transit Project, Draft Environmental Impact Statement (UMTA, IL-23-2005)." 1978. Chicago. Print.