2010 New York Code
VAT - Vehicle & Traffic
Title 7 - RULES OF THE ROAD
Article 25 - (1120 - 1131) DRIVING ON RIGHT SIDE OF ROADWAY, OVERTAKING AND PASSING, ETC.
1120 - Drive on right side of roadway; exceptions.

§ 1120. Drive  on  right  side  of  roadway;  exceptions. (a) Upon all
  roadways of sufficient width a vehicle shall be driven  upon  the  right
  half of the roadway, except as follows:
    1.  When overtaking and passing another vehicle proceeding in the same
  direction under the rules governing such movement;
    * 2. When overtaking or passing pedestrians, animals  or  obstructions
  on the right half of the roadway;
    * NB Effective until November 1, 2010
    * 2.  When  overtaking  or passing bicyclists, pedestrians, animals or
  obstructions on the right half of the roadway;
    * NB Effective November 1, 2010
    3. When an obstruction exists making it necessary to drive to the left
  of the center of the highway; provided, any person so doing shall  yield
  the  right of way to all vehicles traveling in the proper direction upon
  the unobstructed portion of the  highway  within  such  distance  as  to
  constitute an immediate hazard;
    4.  Where  travel  on  the  shoulder  or slope is permitted by section
  eleven hundred thirty-one of this article;
    5. Upon a roadway divided into three marked lanes  for  traffic  under
  the rules applicable thereon; or
    6. Upon a roadway restricted to one-way traffic.
    (b)  In  addition,  upon  all roadways, any vehicle proceeding at less
  than the normal speed of traffic at the time and  place  and  under  the
  conditions  then  existing  shall  be driven in the right-hand lane then
  available for traffic, or as close as practicable to the right-hand curb
  or edge of the roadway,  except  when  overtaking  and  passing  another
  vehicle  proceeding  in  the same direction or when preparing for a left
  turn at an intersection or into a private road or driveway.
    (c) Upon any roadway having four or more lanes for moving traffic  and
  providing for two way movement of traffic, no vehicle shall be driven to
  the  left  of  the center line of the roadway, except when authorized by
  signs or markings designating certain lanes to  the  left  side  of  the
  center  of the roadway for use by traffic not otherwise permitted to use
  such lanes, or except as permitted under subsection (a) (2) hereof.