<P> A support van tails the Cash Cab , containing producers and a camera crew for the various street shots . The staff provide logistical information and questions by way of a walkie - talkie and earpiece worn by the host . The Cash Cab is equipped with ten cameras : one on the host , three on the passengers , one pointing forward from the back window of the cab , and three ( front , left and right ) in the advertising shell on the roof of the cab showing the passing streetscape . The rear of the cab behind the seats contains ten recording decks and other production equipment . </P>
how does the cash cab guy read the questions
walkie - talkie and earpiece worn by the host