An easement is simply the right to use some or all of a real property which belongs to another person or entity. Most easements limit the scope and purpose of the area. Common situations which require easements can range from a billboard sign which is based on a residential property to a high tension line power transmission tower owned by a utility company which is located in the backyard of a residence. A very common easement in rural areas is a driveway which must pass through a third party's property to reach a public road. Easements are often persistent, that is, when title to a property with an easement is transferred, the easement remains effective. This is important - more in part two.