Amtrak's Keystone Service is operating again Thursday between Harrisburg, Pa. and New York, via Philadelphia.
The Ethan Allen Express is ferrying riders again, although Amtrak is providing alternate transportation through the hardest-hit stretch of the route, between Albany and Rutland, Vt.
Routes connecting Chicago with New York and Boston are also running as scheduled.
Earlier Amtrak restored service in the Northeast Corridor, including Acela service between Washington, D.C. and Boston. Portions of some routes remain closed, including those connecting Albany to Buffalo and Niagara Falls, plus Northeast Regional trains between Richmond and Newport News, Va.