Adequate access to a public road is essential for the use of land in a manner fully consistent with its socio-economic purpose. The law provides for institutions whose purpose and function is to provide a land property with appropriate access to a public road, and what follows, to enable the owner of a property to exercise his rights under Article 145 of the Civil Code. Such regulations exist within civil and administrative law and are applicable both in factual circumstances in which a land property is already deprived of access to a public road (curing function) and in situations in which the land may only be created without such access (preventive function). They arouse certain doubts as to their interpretation, which concern in particular the premises for establishing an easement by necessity and the consequences of not establishing an appropriate easement for the separated property which does not have direct contact with a public road.