Thank you for your patience.
It sounds like you have either an Easement by Prescription or and Easement by implication. (If this is the only access to your property you may also have an Easement by Necessity).
In any case you clearly have an easement to use this right of way. Further if the right of way is NOT on your neighbor's property they have no right to block your (or anyone's) use of it.
This link describes the different types of easements recognized in Connecticut:
The correct Court to obtain enforcement of the Easement is through the Superior Court.
Connecticut has a fairly good self help system and you may be able to pursue this on your own. See this link:
But you should at least consult local counsel to assess your case. A local attorney may be able to resolve this through a letter to the neighbor without the need to resort to litigation.
This link can assist you with finding local counsel:
Finally, you want to pursue this as soon as possible. The neighbor may be trying to claim ownership through adverse possession. If you delay in challenging his actions it may complicate the matter significantly.
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