When the title is transferred, the easement typically remains with the property. This case is known as an easement appurtenant. This type of easement runs with the land; which means that if the property is bought or sold, it is bought or sold with the easement in place. The easement essentially becomes part of the legal description.
If a parcel of property with an easement across it is sub-divided into smaller lots and sold to different people, and the geography is such that each of the smaller lots can benefit from the easement, then each will usually be permitted to use the easement.