google了一下，原來是這個意思

EASEMENT TO BATTER

Easement to Batter means the right for a highway authority to maintain the slope and stability of higher land adjoining a highway to ensure the adjoining land does not spill onto the highway.

Within a Batter Easement or Easement to Embank some Councils will allow building or the construction of walls etc but only after they are satisfied that the Road is still ‘supported’ . This usually requires the certification of an engineer followed by a Petition to Amend the sealed plan.

The Petition to Amend can be simple as the only interested parties are Council and the land owner.