5000 series (CTA)
 The 5000 series is a series of Chicago 'L' car built by Bombardier Transportation. A $577 million order for 406 cars was placed in 2006. In July 2011 the CTA ordered 300 more cars for $331 million as an option on the first contract.The 5000-series reuses a numbering set used on 4 experimental articulated train-sets that were in service from 1947 to 1985. Only 2 currently survive 5001 at the Fox River Trolley Museum and 5002 at the Illinois Railway Museum.