High Quality Content by WIKIPEDIA articles! The Keystone Corridor is a Federal Railroad Administration (FRA) "designated high speed corridor" with a 349-mile (562 km) railroad line between Philadelphia, Pennsylvania and Pittsburgh, Pennsylvania with a top speed of 110 miles per hour (180 km/h) . As of November 1, 2006, the track from Lancaster to Parkesburg was upgraded to 110 mile per hour operation, with the section between Paoli and Philadelphia going through a similar upgrade (mainly to allow for 75 to 90 miles per hour (121 to 140 km/h) operation) as part of a USD $145 million project.