Beginning in 1949, Ridge Spur and Bridge Line trains were through-routed, reversing at Market Street station. On February 15, 1953, the Locust Street Subway opened, extending the lower level tracks south and west to 16th and Locust streets. Bridge Line trains were extended to 16th and Locust, while Ridge Spur trains terminated at Market. In January 1954, due to low ridership on the extension, off-peak service and Saturday again began operating between Girard and Camden, with a shuttle train operating between 8th and 16th stations. Sunday service was suspended at that time due to minimal usage.