Chicago Surface Lines

Chicago Surface Lines
Overview
Dates of operation1913; 111 years ago (1913)–
1947; 77 years ago (1947)
SuccessorChicago Transit Authority
Technical
Track gauge4 ft 8+1⁄2 in (1,435 mm)
Chicago Surface Lines car 3142 at Illinois Railway Museum

The Chicago Surface Lines (CSL) was operator of the street railway system of Chicago, Illinois, from 1913 to 1947. The firm is a predecessor of today's publicly owned operator, the Chicago Transit Authority.