| Overview | |
|---|---|
| Dates of operation | 1913– 1947 |
| Successor | Chicago Transit Authority |
| Technical | |
| Track gauge | 4 ft 8+1⁄2 in (1,435 mm) |
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.