[1] Service on the Main Line segment between Glenside and Center City Philadelphia is given a special combined public timetable known as the Glenside Combined, allowing riders to see the schedules of all trains on the Main Line without having to look at multiple schedules.

A contributing factor to the elimination of the R-number naming system came in the fact that few trains actually terminated there, instead continuing on to stations farther out.

Later a new alignment was built to Norristown, leaving the old route from North Philadelphia to Germantown as a branch; this is now the Manayunk/Norristown Line.

The PG&N south of Wayne Junction, the Ninth Street Branch, is now part of the Main Line.

The Center City Commuter Connection was tied into the former Reading Ninth Street Branch on November 12, 1984, completing the SEPTA Main Line as it is defined today.