N.Y. R.R. Law § 83-A
Except in the case of a railroad employee, contractor of the railroad corporation or public official acting in the performance of his or her duties, no person shall knowingly operate a motor vehicle, snowmobile, or other recreational vehicle, including all terrain vehicles and motorcycles, or ride, lead or drive any horse or other animal upon abandoned railroad property which is posted to prohibit the operation of any such vehicles or animals thereupon, or upon or along the track or tracks of an operating railroad or within the fences or guards thereof, except across or along streets or highways or at farm or forest crossings where necessary to cross such tracks or property. A violation of the provisions of this section shall constitute a violation punishable by a fine of not less than one hundred dollars nor more than two hundred fifty dollars. Conviction for a second or subsequent violation of the provisions of this section shall be punishable by a fine of not less than two hundred fifty nor more than five hundred dollars.
N.Y. R.R. Law § 83-A