Drivers are being urged to use caution and use mass transit wherever possible.
Still, scores of accidents were being reported on area roadways.
The major local airports were reporting hundreds of delays and cancellations, so flyers are advised to check with their carrier before attempting to make the trip.
The MTA is operating a normal schedule, though weather-related delays remain possible on all services and customers should consult MTA.info before starting their commute.
New York City Transit expects normal subway and bus service, but all routes are still subject to delays or temporary suspensions if conditions warrant.
The Long Island Rail Road is running on a normal schedule.
Metro-North is running on a normal schedule after underestimating ridership levels during the last storm. The MTA decided to to operating on a weekend schedule last Friday and then had to add more trains to its evening commute to accommodate riders who rode packed trains or couldn't get on one in the morning. Officials were hoping for a smoother ride Tuesday.
MTA Bridges and Tunnels are open for traffic but motorists are advised to drive with extreme caution. All roads and ramps at MTA's seven bridges and two tunnels are being closely monitored throughout the storm and will be de-iced as needed.
New Jersey Transit
All trains and buses are operating on a normal schedule, but bus service in northern New Jersey is subject to delays of up to 40 minutes due to weather-related road conditions. New Jersey Transit is offering systemwide cross-honoring.
Customers are strongly advised to check NJTransit.com for up-to-the-minute service information before starting their trip.
PATH trains are running on a normal schedule, but passengers should be prepared for extra travel time.
Amtrak is operating on a normal schedule.