What is the required size for a license number on a vehicle?

The requirement for the size of a license number on a vehicle is established to ensure that the number is clearly visible and legible for identification purposes. A size of 1.5 inches strikes a balance between being large enough to be seen at a distance while not being excessively large, which could be impractical regarding space on the vehicle or aesthetically unpleasing. Proper visibility of the license number is crucial not only for enforcing laws and regulations but also for identification in various situations, such as traffic stops or accident investigations. This standard reflects considerations for safety, enforcement, and practicality in vehicle identification.