In Britain, the Highway Code is an official book published by the Department of Transport, which contains the rules which tell people how to use public roads safely.
Highway Code in British English
noun
(in Britain) an official government booklet giving guidance to users of public roads
In other languages
Highway Code
British English: Highway Code /ˈhaɪˌweɪ kəʊd/ NOUN
The Highway Code is an official book which contains the rules which tell people how to use public roads safely.