That means that if there are five cars waiting, you have to wait till they all go, then you go. It lacks the notion of alternating, or taking turns, and it's always on the minor road, allowing the major one to have primacy.
つまりもし車が5台並んでいたらあなたは6番目 5台全部行くまで進めません　これには 譲り合いの精神が欠落しています この標識は必ず脇道に設置され 幹線の方に優先権を与えます