In this case, it is not called usufruct but right of way and utility easement, as indicated on the site plan. However, it must not only be stated on the site plan, but there must also be an entry in the land register. This can refer to the site plan. If it does not exist yet, you should have it registered; it can be done in one go with the notarized purchase contract. However, to have complete legal security, you also need an entry in the encumbrance register. So, basically, an encumbrance on the other owner's property, stating that they must keep this strip clear! The land register is private law, the encumbrance is public law. You need both!