In Queensland, any driver convicted of a high range drink-driving offence is required to have an alcohol interlock device fitted to their vehicle for a period of time, set by the court. An alcohol interlock device is an in-car breath testing unit that requires drivers to provide a breath sample before being able to start the engine and during driving at random intervals. If the driver fails or refuses to provide a breath sample they will not be able to start or keep running the vehicle and their licence will be suspended until they can prove having installed an alcohol interlock device in their car.