The registration plates of cars in Norway are maintained by the Norwegian Ministry of Transport and Communications. As in most countries, cars are identified only by number plates read visually. Each plate is a legal document that both identifies the vehicle and permits its use, and shall be returned to the registration authority when the vehicle is no longer in use.
The current alphanumerical system (two letters followed by four or five numbers) was introduced in 1971. The design of the plates remained the same until 2002, when the road authorities decided on a new font which standardized the width of each character.[1] The new design was unsuccessful due to legibility issues, for example the letters "A" and "R" were often hard to distinguish. From 2006 the font was changed again to improve legibility, and space was provided for a blue nationality stripe with a Norwegian flag.[2] From 2009, plates were made of plastic, and produced in a factory at Tønsberg.[3] From 2012, plates are again produced in aluminium due to the plastic plates easily getting damaged in winter.[4]