I am new to this but understand our coverage is important to defend and indemnify the Members and the Officers from claims for negligence e.g. hiring unqualified contractors, ignoring unsafe hazards, directing surface water onto someone’s property,  embezzlement, etc. It also covers the potentially high cost of legal support.  It is important to have both 1. General Liability coverage and 2. Directors and Officers coverage. 

A fellow landowner, guest, service provider,  delivery person - anyone using your road - could sue each landowner or member individually for damages (e.g. bodily injury, property damage).  Am no expert, but understand your own homeowners insurance would not cover claims against you for your role in a road association, whether it be merely as a member or as an officer of the organization. 

This could be an example highlight one risk ( but am not suggesting in any way that this road association had any responsibility)  

https://harpswellanchor.org/2022/01/propane-truck-rolls-over-on-harpswell-neck/?fbclid=IwAR02SsSViCHxh376mTOcGagXV35HLMYjSw1WR1z2OL4vHyZBM1Ctb40hEi8

From my limited experience, it seems like insuring a road association does not fit cleanly into a "category" so some carriers treat it as a "townhouse  homeowners association" that doesn't own any property.  Appears to be expensive, but may be very important in rare circumstances.  It may be an important factor to someone's willingness to serve as an officer of the road association. 

If you type "Insurance" into the Forum Search Box, you will get a number of discussions on this topic.  Pay attention to the dates - there is one from last year entitled "Insurance Agent and Managing Sales" which should be fairly current information on agents and prices.

Yes, the statute does give SOME protection under 23 MRS 3101 subsection 7:  

7.  Immunity from suit.  A commissioner, board or owner of a parcel of land who undertakes activities of a road association under this subchapter is immune from civil liability in all actions by owners or lessees of other lots for the following activities:  

A. The determination of repairs and maintenance to be undertaken;   [PL 2009, c. 238, §1 (NEW).]

B. The determination of materials to be furnished or amount of money to be paid by each owner for repairs and maintenance;   [PL 2009, c. 238, §1 (NEW).]

C. The collection of the money from each owner; and   [PL 2009, c. 238, §1 (NEW).]

D. The awarding of a contract authorized under section 3103.   [PL 2009, c. 238, §1 (NEW).]

But notice that it only protects the Board from actions by "owners or lessees of other lots," and only for certain actions.  It does not protect the board from actions by members of the public outside the road association, or from actions for injury or damage to property.  That's where subsection 9 comes in:

9.  Insurance.  A road association under this subchapter may purchase liability insurance to defend and indemnify the road association's officers, directors and owner members for any and all claims of liability or violation of law concerning the private road, private way or bridge and may include the costs of such insurance in the determination of each owner's share of the total cost under subsection 5.