In states and provinces of North America, the popularity of vanity license plates appears to be increasing by leaps and bounds. Any trip can be enlivened by the simple pastime of collecting vanity tags en route. (On a drive between Washington and Richmond, one can expect to turn up at least thirty vanity tags.)
Tenney, John Brooks
"Pl8 Speek, The Language of Vanity Plates,"
Word Ways: Vol. 30
, Article 2.
Available at: http://digitalcommons.butler.edu/wordways/vol30/iss2/2