Easements and right of ways can be written so many ways that it is hard to say. Easements usually specify certain rights like the power company can access at any time for repairs or maintenance of their line. The property is still yours to pay taxes on and there are restrictions on what you can do with it. A Right of Way may not even be your land or a shared Right of Way may be both of yours. Find out what is written into your property deed.
Sounds like a lousy neighbor and there have been some terrible stories about them on the forum.
MarkV