The farts were drowned out by their incessant harping to their drivers about stopping to ask for directions.
Haha sounds plausible, and please forgive my unclear reference to Rush Limbaugh’s epic “farding” gag from early in his career. Turns out that “to fard’ is a French derived word for applying makeup. He totally blew up the phone lines back in 1990 by spending the better part of a show talking about women “farding in their cars” without revealing that he was actually saying “fard” and not...the other word.