N.Y. Transp. Corp. Law § 93
It shall not be necessary for any such corporation to fence the lands acquired for its corporate purposes. But, if not inclosed by a substantial fence, the owner of the adjoining lands from whom such lands were obtained, his heirs or assigns, may occupy and use such lands in any manner not injurious to the interests of the corporation and shall not be liable therefor, or for any trespass upon any such lands, except for wilful or negligent injury to the pipes, fixtures, machinery or personal property of the corporation. If the corporation shall keep such lands inclosed it shall construct and provide all suitable and necessary crossings with gates for the use and convenience of any owners of lands adjoining the portion of its lands so inclosed, and no claim shall be made by it against any owner of adjoining lands to make or contribute to the making or maintaining of any division fence between such adjoining lands and its lands. If it shall neglect to keep and maintain substantial fences along its lands the owners of adjoining lands may construct and maintain all farm or division fences, and all line fences crossed by such pipe line, in the same manner as though it had not acquired such lands for such pipe line, and it shall be liable for all injuries to such fences caused or done by any of its officers or agents, or any persons acting in their or its behalf, or by any laborer in its or their employ or in the employ of any of its contractors.
N.Y. Transp. Corp. Law § 93