Shown here are the highest license plate numbers observed. The High Road is featured in each issue of PLATES Magazine.
Delaware recycles old numbers continually, and Indiana issues alpha sequences at random. Thus, these states have no progressive “high.”
Alabama, Hawaii, Idaho, Mississippi, Montana, Nebraska, South Dakota, and Wyoming issue plates by a county code system, so the most populous county's high is shown.
Massachusetts, Missouri, and West Virginia issue plates by a month code system, so the latest month of the year issued is shown, usually December.