2010 New York Code
VAT - Vehicle & Traffic
Title 8 - RESPECTIVE POWERS OF STATE AND LOCAL AUTHORITIES
Article 40 - (1650 - 1652-B) REGULATION OF TRAFFIC BY COUNTY SUPERINTENDENT OF HIGHWAYS
1651 - Traffic regulations on county roads outside of cities and villages.

§ 1651. Traffic  regulations  on  county  roads  outside of cities and
  villages. The county superintendent of  highways  of  a  county  may  by
  order,  rule or regulation designate county roads in such county outside
  of cities and villages as through highways and  order  traffic  signals,
  stop  signs,  flashing signals or yield signs erected on county roads or
  town highways  at  specified  entrances  to  such  through  highways  or
  designate  any intersection of a county road with another county road or
  with a town highway as a stop intersection or a yield  intersection  and
  order   like  signs  or  signals  at  one  or  more  entrances  to  such
  intersection.