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it home reported on september 4 that volvo's new electric suv ex90 has added a new safety feature. if the driver stares at the road for too long, the vehicle will issue a warning sound.

this seemingly strange function is actually the result of volvo's research on driver attention. according to volvo's research, if the driver's eyes are focused on the road for less than 60% or more than 90% of the time, they may have a problem of inattention.

"we've done a lot of research within volvo and if you have 80 percent of your attention focused on the road, that's normal," said elsa eugensson, senior manager of volvo's advanced driver assistance systems (adas) team. "if it's below 60 percent, then you're probably distracted and you're not spending enough time looking at the road. but if you're above 90 percent focused on the road, then you're probably 'mind wandering' and that could indicate you're cognitively distracted and maybe you're thinking about other things, things going on in your life."

when the vehicle detects that the driver's attention has deviated from the normal range, it will trigger an alarm to remind the driver to pay attention. the initial reminder may be just a gentle prompt on the dashboard, and if the driver does not respond, the vehicle may further escalate the alarm.

it home noted that with the popularity of smartphones and social media, drivers' attention is increasingly distracted. volvo's new feature is the first attempt to solve a problem we didn't realize before: although the eyes are looking at the road, the brain may not be online.