Never Ever purchase land without having a re-survvey of the property, which will identify its location and dimensions. I have seen many buyers fail to go through this process and in many instances it proves to be disapointing and costly.

Had this been done there would not be an issue as the wall or fence or plants would have been on your property.

Not sure the town owes anyone notice to clean and grade the road.

Having said all the above I understand this is frustrating and I hope that everything works out for you all.