 In the first three months of going live, 9,000,000 vehicles were checked and more than 30,000 warning letters were issued.The use of smartphone applications designed to stop certain phone behaviours while driving is an emerging countermeasure for distracted driving.A study at the Queensland University of Technology examined 29 apps that aim to stop drivers picking up their mobiles and reading and answering texts or engaging in phone calls behind the wheel, and found that many of these road safety apps simply 'hide' incoming texts and calls – they silence notifications so that the driver doesn't know someone is trying to reach them, with the app sending an auto-reply to say the driver can't answer.