---What shall I do? I don't know how to use this big yellow flag.
---You should ask the trafic gurds about it.
---I have already done, but they don't know it, too.
---You should wind it around and use it like a baton.
I don't hear their conversation, but their action confirms my thinking.
(@港南三丁目 Kounan 3-choume, Minato ward)