N.Y. Vehicle & Traffic Law § 1682: Local traffic-control devices

§ 1682. Local traffic-control devices. Local authorities in their

respective jurisdiction shall place and maintain such traffic-control

devices, conforming to the state manual and specifications, as they may

deem necessary to indicate and carry out the provisions of this chapter

or local traffic ordinances, orders, rules or regulations or to

regulate, warn, or guide traffic, except that a city having a population

in excess of one million shall conform to the state manual and

specifications only insofar as such local authority in its discretion

deems practicable.