2015 New York Laws
VAT - Vehicle & Traffic
Title 7 - RULES OF THE ROAD
Article 28 - (1160 - 1166) TURNING AND STARTING AND SIGNALS ON STOPPING AND TURNING
1161 - U turns in certain areas prohibited.

 1161. U turns in certain areas prohibited. a. No motor vehicle shall
  make a U turn upon any curve, or upon the approach to, or near the crest
  of a grade, where such motor vehicle cannot be seen by the driver of any
  other  motor  vehicle  approaching  from  either  direction  within five
  hundred feet.
b. No motor vehicle shall make a U turn within a school zone. For  the
  purposes  of  this  subdivision,  the  term "school zone" shall mean the
  distance along a highway passing a school building, entrance or exit  of
  a school abutting on the highway for which a school sign (S1-1) has been
  posted  pursuant  to  this  chapter and in compliance with the manual on
  uniform traffic control devices maintained pursuant to  section  sixteen
  hundred eighty of this chapter.