Route 15,[a] currently rebranding as the G,[b] is a streetcar line in the SEPTA Metro network that runs along Girard Avenue through North and West Philadelphia, Pennsylvania.

On April 29, 2012, east of Frankford Avenue, the line started being operated by buses due to major reconstruction.

As of January 2020[update], the full line is being substituted by a bus bridge to allow for rolling stock maintenance, track repairs, and a nearby highway expansion.

The western terminus of Route 15 is at the intersection of Girard Avenue and 63rd Street, and instantly passes by Carroll Park.

Directly east of the SEPTA Main Line overpass at 9th Street, Route 15 passes by the Girard Medical Center.

This loop is across from the Rivers Casino which opened in September 2010, and is also a natural turnback point due to high ridership turnover at Front Street and Girard for the Market-Frankford Line.

[15] Girard Avenue ends at Exit 23 on I-95, so Route 15 moves beneath the highway onto Richmond Street, parallel to I-95 until it crosses over the street from the north side to the south side before Exit 25, the interchange with Allegheny Avenue, where it connects to the SEPTA Route 60 bus, another former trolley line.

[citation needed] The company was sold at foreclosure and reorganized as the Fairmount Park and Delaware River Passenger Railway on June 14, 1864,[citation needed] and was merged into the Germantown Passenger Railway (Route 23 Germantown Avenue) on February 15, 1866.

[citation needed] The 15 line returned to trolley service on September 4, 2005, after having been served by buses for thirteen years.

[21] To prepare for the resumption of trolley service, SEPTA spent a total of $100 million, including rehabilitating the tracks and repairs to the overhead wires.

The rebuilt trolley includes the addition of air conditioning and regenerative braking, as well as a widened center door with a wheelchair lift for ADA compliance.

[23] During the reconstruction of the line the surrounding neighborhoods, through grassroots coalitions, worked to improve the Girard Avenue streetscape through beautification and marketing projects.

[25] Route 15 east of the new Northern Liberties loop is being rebuilt as part of a reconstruction project for Interstate 95.

The new bridges, rationalized in width to current Conrail trackage, will provide much greater road clearance by virtue of being relocated away from underneath the I-95 viaduct.

WHYY reported that SEPTA officials had stated that several of the now twice refurbished PCC-II cars were in testing on the route and "at least" eight would be ready by "the end of the summer [2023]."

[10] However, citing the need for more operator training, the agency has delayed the restoration, though still expected to resume trolley service sometime in late 2023.