A study from Direct Line shows that this is much more common than you might imagine. They found that more than a third of adults have got into a car whilst suspecting the driver has been over the drink-drive limit. Many of these occasions may have occurred when the passenger has also been drinking, which may lead to a rash decision being made.
The survey went on to find that despite any reservations, as many as 65% of car passengers decided to stay in the car. A half of all passengers who realise they are being driven by someone who has been drinking admit to acting as a 'look out', watching for speed cameras and police.