road gang vs gang

road gang and gang both are nouns.

Word	Noun	Adjective	Verb	Adverb
road gang	Yes	No	No	No
gang	Yes	No	Yes	No

As nouns, gang is a hypernym of road gang; that is, gang is a word with a broader meaning than road gang:

Other hypernyms of road gang include crew, work party.

road gang (noun)	gang (noun)
a gang of road workers	tool consisting of a combination of implements arranged to work together
	an organized group of workmen
	an association of criminals
	an informal body of friends

road gang (verb)	gang (verb)
	act as an organized group