Despite the MBTA's preparations for the cold weather, there were over 40 delays reported on the Commuter Rail on Friday morning.
The agency stored as many trains as possible overnight, keeping them warm.
However, some issues were reported Friday morning.
Moderate delays were reported between Braintree and Quincy Center due to a disabled train at Quincy Adams in addition to the commuter rail delays.
Delays on the commuter rail were due to track and signal issues as well as general train traffic.
Maintenance crews working around the clock performed air system checks overnight, draining moisture to prevent ice build-up.
Workers also tested doors and track switches to make sure they don't get stuck.
The "T" also concerned about downed trees and branches on tracks, so they have extra crews on standby for that as well.