“When a person drives a car on a highway, he or she agrees to display a license plate,” Erik Barnett, an assistant deputy director at U.S. Immigration and Customs Enforcement and attache to the European Union at the Department of Homeland Security, wrote. “The license plate’s identifiers are ignored most of the time by law enforcement. Law enforcement will use the identifiers, though, to determine the driver’s identity if the car is involved in a legal infraction or otherwise becomes a matter of public interest. Similarly, should not every individual be required to display a ‘license plate’ on the digital super-highway?”
"Regardless of the legal speed limit, your Buick must be operated at speeds faster than 85 MPH (140kph)." -- 1987 Buick Grand National owners manual.