The Airport Line (formerly the R1 Airport) is a route of the SEPTA Regional Rail commuter rail system in Philadelphia, Pennsylvania, which officially runs between Philadelphia International Airport through Center City to Temple University station. In practice, however, only a few trains originate or terminate at Temple University; most are through routed with lines to the north after leaving the Center City Commuter Connection. Half of weekday trains are through routed with the Warminster Line, with the other half of weekday trains through routed with the Fox Chase Line. All weekend and holiday trains are through routed with the Warminster Line and terminate either in Warminster or Glenside. The line between Center City and the airport runs seven days a week from 5:00 am to midnight with trains every 30 minutes on weekdays and every hour on weekends and holidays. The trip length from Suburban Station to the airport is 19 to 24 minutes. The line is fully grade-separated in the normal service, but one public grade crossing between Temple University and Glenside is present at Rices Mill Road in Glenside. Route While geographically on the former Pennsylvania Railroad side of the Regional Rail System, the route consists of new construction, a reconstructed industrial branch of the former Pennsylvania Railroad, and a shared Conrail (formerly Reading Company) freight branch. The Airport Line opened on April 28, 1985, as SEPTA R1, providing service from Center City to Philadelphia International Airport. By its twentieth anniversary in 2005, the line had carried over 20 million passengers to and from the airport. The line splits from Amtrak's Northeast Corridor north of Darby and passes over it via a flying junction. West of the airport, the line breaks from the old right-of-way and a new bridge carries it over I-95 and into the airport terminals between the baggage claim (arrivals) and the check-in counters (departures). The line stops at four stations which are directly connected to each airport terminal by escalators and elevators which rise one level to the walkways between the arrival and departure areas. All airport stations feature high-level platforms to make it easier to board and alight from the train with luggage. Some stations can be accessed directly from the arrivals concourse by crossing Commercial Vehicles Road. The line ends between Terminals E and F at their combined station. , most weekday Airport Line trains are through routed with the Warminster Line