First and foremost, your family member should contact a good real estate attorney in the state where they are buying.  Their attorney should be the only one advising them as to the real ramifications of the easement.

 But for fun, you can start out by determining whether your relative will be holding the servient or dominant estate.  The land owner will hold the servient estate, and the easement holder the dominant estate.  Search the servient  parcel to find the easement agreement, or the document in which the easement is created (often a deed), and any amending instruments, and and you might get an idea as to what your relative's rights will be to the enjoyment to, or burden of,  the easement, and what their responsibilities for maintenance will be.

I'm going on the assumption here (which one should never do, and we all know why) that one party owns the land and the other party has use of a part of it.  If it's a shared drive in  a townhouse or condo or something like that, disregard the preceding paragraph. 

Disclaimer:  For internet banter purposes only.