A highway patrol is a police unit, detail, or law enforcement agency created primarily for the purpose of overseeing and enforcing traffic safety compliance on roads and highways within a jurisdiction. They are also referred to in many countries as traffic police, although in other countries this term is more commonly used to refer to foot officers on point duty who control traffic at junctions.
Western Australia Police, Holden Commodore of the Traffic Enforcement Group
Audi patrol car from the Belgian Federal Police's Roads and Highways Unit
Brazilian Federal police patrol on a Brazilian highway
A highway patrol vehicle of the Lower Saxony State Police
A highway is any public or private road or other public way on land. It is used for major roads, but also includes other public roads and public tracks. In the United States, it is used as an equivalent term to controlled-access highway, or a translation for Autobahn, autostrada, autoroute, etc.
A typical Interstate Highway in Chicago, Illinois, United States
The Tampere Highway in Vantaa, Finland
The I-75/I-85 Downtown Connector in Atlanta, Georgia, in the United States
Part of the AVUS road in Berlin, the first automobile-only road, which served as an inspiration for Piero Puricelli's 1924 autostrada between Milan and the northern Italian lakes, the first motorway in the world.