A greenway is a linear space, used by the public, linking parks and other areas through a town, city, or country. It consists of paths, trails, sidewalks, and vehicle-free roadside areas in which motor vehicles are not meant to be used. Runners, cyclists, and dog walkers often take advantage of these areas, as well as anyone who wishes to safely traverse through town without a car. Ambitious greenways are built all over the world, including one along the entire eastern border of the United States. Green belts, which may be compared to large-scale greenways, are prominent in the United Kingdom.