Partial automated systems increase likelihood of distracted driving: study

A couple of studies conducted by the Insurance Institute for Highway Safety (IIHS) have determined that partial automated driving solutions could increase the likelihood of drivers engaging in distracted driving behaviors. This was especially the case once drivers became more familiar with how partial automated driving systems worked. 

“These results are a good reminder of the way people learn. If you train them to think that paying attention means nudging the steering wheel every few seconds, then that’s exactly what they’ll do,” IIHS President David Harkey stated. 

The IIHS focused its studies on two partial automated driving systems that are available today—Volvo’s Pilot Assist and Tesla’s Autopilot. In the first study, researchers analyzed how the driving behavior of 29 volunteers who were supplied with a 2017 Volvo S90 sedan with Pilot Assist changed over a four-week period. 

The second study tracked how 14 drivers who had never used Tesla Autopilot or other partial automation system changed their driving behavior over a month, as noted by the IIHS in a post. The second group drove a 2020 Tesla Model 3. It should be noted that when the Tesla Autopilot study was conducted, the electric vehicle maker relied only on steering wheel nags to monitor driver attentiveness. 

The findings of the IIHS’ studies were notable. As noted by IIHS Senior Research Scientist Ian Reagan, drivers became more complacent the more they became familiar and comfortable with how the partial automated driving system worked. Over the course of the study, the IIHS observed that drivers were engaged in distracting visual-manual activities–such as eating, grooming, and using electronics–more often when using Pilot Assist than when they were driving without it. 

The Tesla Autopilot group, on the other hand, eventually learned how to avoid triggering the Model 3’s Autopilot alerts. As per the IIHS, “researchers found that the drivers did nondriving secondary activities, looked away from the road, and had both hands off the wheel more often during the alerts and in the 10 seconds before and after them as they learned how the attention reminders worked.” The IIHS also noted that the more drivers got used to Autopilot, the less time it took them to take their hands off the wheel once the system’s alerts stopped—even if Tesla specifically indicates that Autopilot is a hands-on solution. 

IIHS Senior Research Scientist Alexandra Mueller shared her insights about the study. “These results show that escalating, multimodal attention reminders are very effective in getting drivers to change their behavior. However, better safeguards are needed to ensure that the behavior change actually translates to more attentive driving,” she noted. 

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