From Longman Dictionary of Contemporary Englishtwo-way streetˌtwo-way ˈstreet noun → something is a two-way street
Examples from the Corpus
two-way street• But creative collaboration is a two-way street.• Education is a two-way street.• But the link between diagnosis and treatment is a two-way street.• The superiors, however, saw these responsibilities as more of a two-way street than did the subordinates. 