New York N. Carolina N. Dakota Ohio Oklahoma Oregon Penn. If you've got an attorney it is best to have him or her assist you. A survey isn't going to be correct or legal just because it is recorded. The chain of title should disclose who owns what property. Even if a subsequent deed enlarges the property, it doesn't create ownership over the new area.
Conflicting surveys can lead to a third survey, or settlement, or court battles.
A court can declare which survey is correct and define the properties. The county road may be an easement or something. An easement allows the owner to use the property in a manner which doesn't interfere with the easement holder's rights. If the road has never been developed, it likely can be used just fine. If the land actually belongs to the county, then he's just attempting to take more than what he owns, and he does so at his own risk.