Metra spokesperson Judy Pardonnet told ABC7 that Thursday train schedules would be modified and encouraged riders to check its website, www.metrarail.com, for continued updates.
The lines that continued to function operated on a Sunday schedule. Metra made that decision when a state of emergency was declared in four counties, which prevented Metra's crews from getting to work.
Knowing the number of passengers would be lower than normal was also a contributing factor. There were also problems with switches.
Blowers were used to clear the snow from the tracks.
CTA trains were running Wednesday except for the Yellow Line due to blowing and drifting snow and a section of the Pink Line between 54th and Pulaski.
The Brown Line was down for several hours and the overall number of trains was reduced.
Although the buses were rolling, waits were longer than usual.
CTA officials anticipate having everything back up and fully functioning by Thursday morning's rush hour. But remember, with side streets full of snow, bus service could be difficult in some areas.
More information on CTA service can be found at www.transitchicago.com.
In the Chicago suburbs, PACE said the agency would suspend all bus service at 6 p.m. on Wednesday due to impassable roads and icy conditions expected later in the day.
Pace will continue to provide updates to passengers via its website at www.pacebus.com.