Meaning of HIGHWAY in English
n.1 a a public road. b a main route (by land or water).
2 a direct course of action (on the highway to success).
Phrases and idioms:
Highway Code Brit. the official booklet of guidance for road-users. King's (or Queen's) highway a public road, regarded as being under the sovereign's protection.
Oxford English vocab. Оксфордский английский словарь. 2012