Railway Media, Middletown, Aston and Chester Electric Railway Middletown, Highspire and Steelton Street Railway Monongahela Street Railway Montgomery and Chester Electric Railway Montgomery County Passenger Railway Montgomery County Rapid Transit Company Montgomery Traction Company Montoursville Passenger Railway Morningside Electric Street Railway Mount Vernon Electric Street Railway Mount Washington Street Railway Neversink Mountain Railway New Castle and Lowell Railway New Holland, Blue Ball and Terre Hill Street Railway New Homestead Street Railway New Jersey and Pennsylvania Traction Company Newtown Electric Railway Newtown, Langhorne and Bristol Trolley Street Railway Newtown and Yardley Street Railway Northampton Central Street Railway Northampton Traction Company Northern Cambria Street Railway Northern Electric Street Railway Northern Passenger Railway Norristown Passenger Railway Northumberland County Traction Company Oakdale and McDonald Street Railway Oil City, Rouseville and Franklin Railway Oil City Station Railway Olean, Rock City and Bradford Railroad Olean, Rock City and Bradford Electric Railroad Oley Valley Railway Oxford, West Grove and Avondale Street Railway Patterson Heights Street Railway Pennsylvania and Mahoning Valley Railway Pennsylvania and Maryland Street Railway Pennsylvania Motor Company People's Railway People's Passenger Railway People's Street Railway of Nanticoke and Newport Philadelphia, Bristol and Trenton Street Railway Philadelphia, Cheltenham and Jenkintown Passenger Railway Philadelphia and Chester Railway Philadelphia City Passenger Railway Philadelphia and Darby Railway Philadelphia and Easton Electric Railway Philadelphia and Easton Railway Philadelphia and Garrettford Street Railway Philadelphia and Grays Ferry Passenger Railway Philadelphia, Morton and Swarthmore Street Railway Philadelphia Rapid Transit Company Philadelphia Suburban Transportation Company Philadelphia Traction Company Philadelphia and West Chester Traction Company Philadelphia and Western Railroad Philadelphia and Western Railway Philadelphia and Willow Grove Street Railway Pittsburgh and Allegheny Valley Railway Pittsburgh and Birmingham Traction Company Pittsburgh and Charleroi Street Railway Pittsburgh, Harmony, Butler and New Castle Railway Pittsburgh, McKeesport and Greensburg Railway Pittsburgh, McKeesport and Westmoreland Railway Pittsburgh Railways Pittsburgh Traction Company Pittston and Scranton Street Railway Plymouth and Larksville Railway Port Carbon and Middleport Electric Railway Pottstown and Northern Street Railway Pottstown Passenger Railway Pottstown and Reading Street Railway Pottsville and Reading Railway Pottsville Union Traction Company Quakertown Traction Railway Reading City Passenger Railway Reading and Southwestern Street Railway Reading and Temple Electric Railway Reading Traction Company Reading Transit and Light Company Red Lion and Windsor Street Railway Ridge Avenue Connecting Railway Ridge Avenue Passenger Railway Rohrerstown, Landisville and Mount Joy Street Railway Roxborough, Chestnut Hill and Norristown Railway Schuylkill Railway Schuylkill Electric Railway Schuylkill Haven and Orwigsburg Street