The day after the MBTA's general manager announced her resignation, T commuters encountered delays and packed trains as the transit agency continued to be affected by winter weather.

Lines have been so long for the shuttle buses replacing rail service on the Braintree branch of the Red Line that the T is bringing in a private bus company to help with Thursday's evening commute.

"For the bus shuttle replacing the Braintree line, our hard working bus operators are getting some help from their brothers and sisters at Peter Pan," T spokesman Joe Pesaturo said in a statement. "For the late afternoon/early evening commute [Thursday], 23 Peter Pan buses will supplement the existing MBTA bus shuttle service."

The Peter Pan buses will run "express" between JFK/UMass and Braintree, with regular T buses stopping at all stations.