How to obtain easement of way?

"Servitude is a limited property right that gives one person (the servient party) the right to use another person's property (most commonly the property owner) in a certain way, e.g. passing through the property, using its fruits or installing conduits. There are situations where the access to one's own plot of land goes through a neighbor's plot, and acquiring a servitude is necessary in order to access the property. How can one obtain a servitude of way? Does it involve any costs? How long does such a process take?"