One more thing to think about… are you involved in a transaction where access to the property involves a railroad crossing? According to the Maine Department of Transportation, unless there is deeded access, the property owner must have permission and an agreement with the railroad owner to cross. In the absence of this agreement the landowner could actually be considered guilty of trespass.
As with all rights of way and easements, this is not a particularly simple topic. Much of the information you’ll need can be found by downloading a pdf file from the Maine.gov website. Note these requirements apply not only to active crossings… you’ll want to consult an attorney who is familiar with the topic.