The Lansdale/Doylestown Line is a SEPTA Regional Rail line connecting Center City Philadelphia to Doylestown in Bucks County, Pennsylvania. Until 1981, diesel-powered trains continued on the Bethlehem Branch from Lansdale to Quakertown, Bethlehem, and Allentown. Restored service has been proposed, but is not planned by SEPTA. The line is currently used by the East Penn Railroad, serving Quakertown's industrial complexes and distribution centers. With around 17,000 daily riders every weekday in 2019, it is the second busiest line in SEPTA's Regional Rail network.