2006 New York Code - Snow Emergency.

 
    § 144-b. Snow  emergency.  A determination made by the official having
  jurisdiction of a  highway  that,  because  of  existing  or  forecasted
  weather  conditions,  pursuant  to  section  sixteen hundred twenty-one,
  sixteen hundred forty, sixteen hundred fifty or sixteen hundred sixty of
  this chapter, traffic shall be regulated in accordance with section  one
  hundred forty-five-c of this article.