N.Y. Vehicle & Traffic Law § 1684: State highways maintained by the state

§ 1684. State highways maintained by the state. No local authority

shall place or maintain any traffic-control device on any state highway

maintained by the state, or at any location so as to prohibit, restrict

or limit the movement of traffic proceeding along, entering or crossing

such highway, nor shall any ordinance, rule or regulation affecting

traffic or stopping, standing or parking on state highways maintained by

the state be effective unless or until approval in writing has been

obtained from the department of transportation, and the department of

transportation may at any time rescind or modify such approval.