If what?

I often hear radio announcements telling me: "If you are heading............." an accident/hold up has occurred, and "If you’d like to go along.............. " some event will be taking place.

It's nonsense. Do the presenters of these messages really mean that if I don't head (travel) in that direction the accident/hold up will miraculously disappear, and that if I choose not to go along the event won't take place? I don't think so.