All Regional Rail lines were running again Monday morning, but with delays up to 30 minutes due to weather-related issues, SEPTA says.
Knueppel said the Regional Rail lines might be operating slower than normal.
Many of the Regional Rail lines are operating at least two cars short, so passengers may experience overcrowding.
Service on the Paoli/Thorndale line is canceled between Malvern and Thorndale due to Amtrak switch problems.
On the Wilmington/Newark line, train #1295 to Newark and train #9212 to Center City are canceled due to equipment problems.
The Norristown High Speed Line will run from 69th Street to Bryn Mawr, with no service beyond Bryn Mawr to Norristown.
SEPTA continues to work to clear the remainder of the track and hopes to have the entire line running at some point Monday.
Service on the Broad Street Line subway and the Market Frankford Line resumed Monday morning.