N.Y. Veh. & Traf. Law § 1663

§ 1663. Special speed limits on bridges and other elevated structures.\nThe town board of any town may determine the maximum speed which may be\nmaintained without structural damage to bridges and elevated structures\nthat are a part of any town highway in such town and, if, such maximum\nspeed is lower than the maximum speed limit otherwise applicable, may by\norder, rule or regulation establish such lower maximum speed limit at\nwhich vehicles may proceed on any such bridge or structure.\n