In 2011, SEPTA completed a new loop for Route 15 at the intersection of Frankford and Delaware Avenues, reached via new trackage down Frankford from Girard.
In addition to the Frankford and Delaware loop, two other short-turn loops exist: at 41st & Parkside, just west of the Philadelphia Zoo, and at 26th & Girard (a bidirectional "in-line" cutback utilizing 26th and Poplar Streets and Girard and College Avenues).