Work Expands at Northern State, Deer Park Exchange

Work is expanding on the Northern State Parkway-Route 231 interchange, according to the New York State Department of Transportation.

The $15.7 million project includes:

  • At the southwest quadrant of the interchange, a new entrance ramp will be constructed from Route 231 southbound directly to eastbound Northern State Parkway, eliminating the left turn entrance via Deforest Road. A new exit ramp also will be built with a longer deceleration lane from eastbound Northern State Parkway to southbound State Route 231.
  • In the southeast corner, the exit ramp from Northern State Parkway eastbound to northbound State Route 231 will be relocated and built wider and longer than the existing ramp.  Exiting traffic will then join westbound Deforest Road with an extra lane of traffic travelling to a new traffic signal at Deforest Road and State Route 231.  A raised median on Deforest Road will also be installed.
  • Along Northern State Parkway, a longer acceleration lane will be installed for the entrance ramp on State Route 231 southbound to westbound Northern State Parkway.  The Northern State Parkway deceleration lane to northbound State Route 231 will be lengthened and the westbound Northern State Parkway will be upgraded, helping to move slower vehicles off the mainline of the parkway and smooth traffic flow.
  • On State Route 231, a raised center median will be installed, traffic signals will be reconfigured for easier travel, a new right turning lane for southbound traffic to eastbound Northern State Parkway will be added, and new sidewalks will be built, including enhanced pedestrian signals and ramps compliant with the Americans with Disabilities Act.

Motorists are reminded that fines are doubled for speeding in work zones.  In accordance with the Work Zone Safety Act of 2005, convictions of two or more speeding violations in a work zone could result in the suspension of an individual’s driver’s license.

For up-to-date travel information, call 511, visit, or the mobile site at


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