Police in Durham in the UK are trialing new devices that require drunk-drivers to take a sobriety test every time before they drive a car.
If they are over the limit, the vehicle fitted with the interlock is immobilised.
The devices are being offered to offenders on a voluntary basis and will be freely offered to anyone in the area to help reduce road accidents.
Drivers are required to use the breathalyser to start a car and again at random points during the journey.
Data is then sent to officers in real time.
Evidence from other countries implementing the similar programmes shows that alcohol interlocks are effective and cost-effective in reducing reoffending, reports Sky News.
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