こうそくじどうしゃこくどう 高速自動車国道 LinksSentence search for 高速自動車国道Sentence search for こうそくじどうしゃこくどうKanji details for 高, 速, 自, 動, 車, 国 and 道Edit in JMdict Noun1. national highway; national expressway; national motorway Discussions Log in to talk about this word.