If any of the owners or occupiers of lands affected by such railway shall consider the accommodation works made by the company, or directed by such justices to be made by the company, insufficient for the commodious use of their respective lands, it shall be lawful for any such owner or occupier, at any time, at his own expence, to make such further works for that purpose as he shall think necessary, and as shall be agreed to by the company, or, in case of difference, as shall be authorized by two justices.