The restored limited service Tuesday on its major lines, including the Ronkonkoma and Port Jefferson routes and expects to continue limited service to Penn Station.
The railroad, which suspended its operations on Monday due to the storm, restored limited service eastbound from Penn Station to Ronkonkoma, Port Washington, Huntington and Babylon Monday night.
The railroad reported it was working around the clock to restore all service.
The Ronkonkoma branch runs through Bethpage and Hicksville stations. The Port Jefferson line runs through Syosset and Hicksville.