EnglishAfrikaansAlbanianAmharicArabicArmenianAzerbaijaniBasqueBelarusianBengaliBosnianBulgarianCatalanCebuanoChichewaChinese (Simplified)Chinese (Traditional)CorsicanCroatianCzechDanishDutchEsperantoEstonianFilipinoFinnishFrenchFrisianGalicianGeorgianGermanGreekGujaratiHaitian CreoleHausaHawaiianHebrewHindiHmongHungarianIcelandicIgboIndonesianIrishItalianJapaneseJavaneseKannadaKazakhKhmerKoreanKurdish (Kurmanji)KyrgyzLaoLatinLatvianLithuanianLuxembourgishMacedonianMalagasyMalayMalayalamMalteseMaoriMarathiMongolianMyanmar (Burmese)NepaliNorwegianPashtoPersianPolishPortuguesePunjabiRomanianRussianSamoanScottish GaelicSerbianSesothoShonaSindhiSinhalaSlovakSlovenianSomaliSpanishSudaneseSwahiliSwedishTajikTamilTeluguThaiTurkishUkrainianUrduUzbekVietnameseWelshXhosaYiddishYorubaZuluThe only mail canceled on the inaugural trip of any highway route was philatelic mail.
Highway Post Office First Trip cover- Aberdeen, South Dakota to Baker, Montana
Highway Post Office First Trip cover- between Amarillo, Texas and Roswell, New Mexico
Motorized Highway Post Office Service cover- Harrisonburg, VA to Washington, DC
Highway Post Office First Trip cover- between Louisville, KY and St. Louis, MO
