Legal Question in Real Estate Law in California

My approach would be to find a surveyor who is also a reasonably good public speaker who could testify credibly, and have the road, as constructed, surveyed as to its physical location relative to the deeded easement. Then, you'll be in possession of facts that you can use credibly in court and you'll have an expert witness to present them. Taking action without having expert testimony available is likely to result in an adverse result, and is well worth the investment.

I meant, of course, that it is well worth the investment to get a survey done before going to court.

I agree COMPLETELY with Mr. Whipple. Get a good survey done before you do anything. If the survey shows all or part of the road is not within a legal easement, hire a lawyer to guide you through the next steps. Engaging in "self-help" such as blocking the road or tearing it out is a really good way to get sued, making you look like the bad guy even if you are right. You may be able to take such steps and sue, but it's not something to just go off and do without careful legal planning and guidance. I have 30-years experience with these kinds of cases, and practice throughout California. So if I can be of further assistance, feel free to contact me.