Chicago Transit Authority President Dorval Carter Jr. on Monday announced his retirement at the end of the month after 40 years of service in public transportation.Carter's retirement is effective Friday,

Carter’s resignation comes as a debate brews in Springfield about whether to combine the CTA with Metra, Pace and the Regional Transportation Authority.

Block Club Chicago's reporting uncovered mismanagement and a lack of accountability from leadership of the Chicago Transit Authority, with far-reaching consequences for riders and the agency's employees.