the Fern Rock Transportation Center of the Broad Street Line. Trolley The Subway–Surface Trolley Lines are the remnants of an extensive pre-World War II streetcar system, similar to the Boston Green Line and San Francisco Muni Metro. The trolley lines were originally run by different companies, until their consolidation by the Philadelphia Rapid Transit Company in 1906. The trolleys run in a tunnel from the Drexel University and University of Pennsylvania campuses to a loop around City Hall. Unlike light rail systems with articulated vehicles, the trolley lines use vehicles closer in size to classic PCC streetcars. Route 15, commonly known as the Girard Avenue Trolley, was restored in 2005 after having been operated with buses for 13 years. The 15 line runs along Girard Avenue through Greater Kensington, North Philadelphia, and West Philadelphia. The trolley utilizes restored PCC streetcars, a type of heritage trolley built in the 1930s. The trolleys were rebuilt with added air conditioning and regenerative braking. Route 15 is the only active trolley line in Philadelphia that is not part of the Subway-Surface Trolley Line system. Regional Rail SEPTA's Regional Rail division consists of 13 lines with 153 active stations, totaling of trackage. Each line is named by their station terminals, with the exception of the Manayunk/Norristown Line. The core of the Regional Rail system is the Center City Commuter Connection, a four-track tunnel under Center City linking three downtown stations: 30th Street Station, Suburban Station, and Jefferson Station. The Center City Commuter Connection was opened in 1984, built to connect the stub ends of the Pennsylvania Railroad and the Reading Railroad commuter rail systems. All SEPTA trains stop at the three downtown stations, with the exception of the Cynwyd Line. Most trains stop at Temple University station, located on the eastern edge of the Temple University campus. Because the tunnel makes the through-routing of trains possible, most inbound trains from one line continue as outbound trains on another line. PATCO Speedline The PATCO Speedline is a grade-separated system linking Philadelphia to the cities of Camden, Haddonfield, and Lindenwold in New Jersey. The Speedline has a daily ridership of 38,000, and is the primary transit link between South Jersey and Philadelphia. It is operated by the Port Authority Transit Corporation, a subsidiary of the Delaware River Port Authority (DRPA), and is the only rail line in Philadelphia to operate 24 hours a day during the week.