When Waze offers navigation Guidance to "turn", "exit", or "retain" onto an unnamed section, it will seem in advance within the proposed route for any road name that it can use. If there is a named phase further alongside the proposed route, it'll use (inherit) that name in the instruction. https://bookmarkalexa.com/story4061490/the-fact-about-road-name-that-no-one-is-suggesting