Tourist highways may be formed when existing roads are promoted with traffic signs and advertising material.
Others may be roadways enjoyed by local citizens in areas of unique or exceptional natural beauty, such as the Lake District.
Some tourist routes, such as Great West Way, can be described as 'multi-modal', able to be followed by a mix of transportation types, including road, waterway, rail, bicycle or on foot.
Unlike most scenic routes, National Parkways are built with a buffer of park land along both sides of the roadway.
Being popular in Europe, they can cover anything from an individual city, a wine growing region, Dutch tulip fields, Swiss Mountains, to Norwegian Fjords.