Volvo is to install technology in its self-driving cars that can detect if the driver is drunk.
The Swedish carmaker said that from next year all new vehicles will have cameras and sensors to spot if the motorist is showing signs of being over the limit.
Cars will slow down by before ringing the Volvo call centre where a member of the customer service will speak to the driver and take over the car if necessary.
The self-driving vehicle may even park the car by itself if the driver is unresponsive.
The new safety features are part of the manufacturers pledge to eliminate all passenger deaths.
The advanced technology will be fitted on all larger models such as the XC90 SUV before being added to smaller cars in the range.
Sensors in the car will monitor changes in the physical movements of both the driver and the car to determine if an intervention is required.
Cameras focused on the driver’s eyes will look for changes such as pupil dilatation. while sensors on the steering wheel can tell how reactive the individual is behind the wheel.
This also means intervening if the drivers appears too tired or distracted by checking a mobile phone – one of the biggest factors causing road accidents.
Other sensors fitted to the car itself will sense whether the car is moving erratically.