 The license plates are all abbreviations for titles of films by  John Hughes (I) (qv). Katies = VCTN (National Lampoons  _Vacation (1983)_ (qv)); Jeannies = TBC  (_Breakfast Club, The (1985)_ (qv)); Toms = MMOM  (_Mr. Mom (1983)_ (qv)); Rooneys = 4FBDO  (_Ferris Buellers Day Off (1986)_ (qv)).