ยง  56.  State to maintain roads improved by state appropriations under
  special laws. When any highway has been constructed or improved under  a
  special  law,  with moneys taken from the state treasury and under plans
  prepared by a state department, the commissioner of  transportation  may
  at  any  time  inspect  such  highway  and  if  he determine it to be of
  sufficient importance and properly constructed, he  may  make  an  order
  directing  that  such  highway  become  a  part  of  the system of state
  highways in such county, and thereafter such highway shall be maintained
  as a state highway. Such order shall be served upon the chairman of  the
  board of supervisors, and a certified copy thereof shall be filed in the
  office  of  the  county  clerk  and  one  in  the  office  of  the state
  comptroller.
Structure New York Laws
31 - Exchange of Reservation Lands of the Seneca Nation of Indians.
38 - Contracts for Construction or Improvement of Highways.
39 - Patented Material or Articles.
41 - Maintenance of Highways After Preliminary Work Pending Permanent Paving.
42 - Maintenance of Detours During Construction.
42-A - Establishment of Temporary Detours When State Highways Are Being Maintained or Repaired.
44 - Acceptance of State Highways When Completed.
45 - Entry Upon Adjacent Lands and Streams.
46 - State Highways in Villages.
47 - Connecting Highways in Villages.
48 - State Highways of Additional Width and Increased Cost at Expense of Town.
50 - Petition for Improvement of Highway Where a Street Surface Railroad Is Laid.
51 - Repair of Highways at Railroad Crossings.
52 - Permits for Work Within the State Highway Right of Way.
53 - Highways and Bridges on Indian Reservations.
53-A - Highways on Indian Reservations.
54 - Sidewalks Along Improved State Highways.
54-A - Reestablishment of Approaches to Private Lands.
55 - Emergency Aid for Control of Snow and Ice in Municipalities.
56 - State to Maintain Roads Improved by State Appropriations Under Special Laws.
57 - Maintenance by State of Canal Bridge Approaches.
58 - Liability of State for Damages.
60 - Sprinkling; Removal of Filth and Refuse.
61 - Payment by Counties of a Portion of the Cost of Construction Under Repair Contracts.
62 - Improvement of Alignment and of Dangerous Conditions on Repair Work.
63 - Discontinuance of Part of Highway Due to Grade Crossing Elimination.
64 - Maintenance by State of Certain Improved Roads and Highways.