SEPTA's Broad Street Line, Market-Frankford Line and trolley routes will continue running 24 hours during the snow storm, officials said.
Regional rail and certain bus lines, which have been shut down, will make limited runs from 3 p.m. to about 10 p.m. today. The bus routes that will run are: 6, 14, 17, 21, 23, 52, 56, 59, 66 and 79.
The Streets Department this morning plowed major routes, which should be "generally passable," Streets Commissioner David Perri said.
Still, officials asked residents to stay off the roads, as crews prepare to work their way through smaller streets and deal with continuing precipitation.
"Hard pack has developed on some of these streets," Perri said, referring to a slick roads that are particularly difficult to de-ice.
The city's 3-1-1 call center and Emergency Operation Center, which operated overnight, received 650 calls between 8 p.m. last night and 9 a.m. this morning.
Several employees at the EOC said that the call load had been manageable overnight and that most people seemed prepared for the storm.