Another Study Shows Just How Careless Driver Assist Tech Is Making Us

A safety driver sits behind the wheel of a self-driving taxi in South Korea.
A safety driver sits behind the wheel of a self-driving taxi in South Korea.
Photo: Ed Jones/AFP via Getty Images (Getty Images)

The closer cars get to driving themselves, the more distracted we’ll become behind the wheel. It’s hardly a surprising thought, but it’s been supported once again by a new study from the Insurance Institute for Highway Safety and the Massachusetts Institute of Technology’s AgeLab.


For this experiment, 20 Massachusetts drivers were given one of two cars with differing assisted-driving technologies to use for a month. Ten were provided with a Range Rover Evoque equipped with adaptive cruise control, while the other 10 were supplied with a Volvo S90 outfitted not only with adaptive criuse control but also Volvo’s Pilot Assist system. Pilot Assist allows the car to steer itself within its lane as well as to adjust the vehicle speed for a safe following distance, making the S90 a Level 2 autonomous vehicle. The Range Rover, conversely, is classified as Level 1.

It probably won’t surprise you to learn that after the month was over, all participants were more likely to exhibit habits of “disengagement” compared with their driving of a vehicle without assistance technology. Disengagement is what the IIHS calls behaviors like removing both hands from the wheel or diverting attention from the road to use cellphones and adjust vehicle controls. The more alarming bit is how bad it got for the Volvo group, as IIHS senior research scientist Ian Reagan explains (important parts bolded by yours truly):

“Drivers were more than twice as likely to show signs of disengagement after a month of using [Volvo’s] Pilot Assist compared with the beginning of the study,” Reagan says. “Compared with driving manually, they were more than 12 times as likely to take both hands off the wheel after they’d gotten used to how the lane centering worked.”

This is an inevitability. The road to full autonomy is very long, and until carmakers get to the end of it we’re going to keep seeing progressively more capable technologies that automate certain aspects of driving but never the whole act. Of course, drivers must always be at the ready to assume control in case human intervention is suddenly needed. But that’s fundamentally at odds with the reasons people want self-driving cars in the first place, which is to do everything but drive.

Communication between assisted driving systems and drivers could also use some improvement. A few months ago, I drove a Hyundai Sonata Hybrid equipped with the Highway Driving Assist feature. I took my hands off the wheel on a few occasions to determine how long the car would do its thing before demanding my full attention. Sometimes it’d take 10 seconds; other times, more than half a minute. I was never able to determine the reason for the inconsistency.

However, there may be a silver lining here. Remember the group driving the Range Rover Evoque that had only adaptive cruise control? Turns out that while those subjects did pick up some ill-advised habits, the particular behaviors weren’t as careless, and those drivers were no more likely to stop holding the wheel at the end of the month:

Drivers of the Evoque, who used ACC often, were more likely to look at or pick up a cell phone while using the assistance technology than when driving manually, and that tendency increased substantially as they grew familiar with ACC. On the other hand, increased familiarity did not result in more frequent texting or other kinds of cell phone manipulation known to increase crash risk (see “Large naturalistic study provides new window on driver distraction,” Dec. 10, 2015). Unlike drivers using Pilot Assist, drivers using ACC in both the Evoque and the S90 weren’t any more likely to remove both hands from the wheel than when driving manually.


Perhaps there’s a sweet spot — a “just right” degree of assisted driving tech that makes road travel safer but still requires enough engagement that drivers can’t ever completely nod off. It’s a nice thought, but the way modern cars are marketed, and the expectations buyers have of them, suggests that this problem is going to keep getting worse before it gets better.


Mod Motor Guy

My daily is a 2002 Ford Mustang GT. It has some very nifty driver assist features, such as a gear lever and a clutch pedal!

It’s actually an engaging car to drive. It is motoring at it’s core, the roar of the engine, a bark into 2nd gear, steering that you can actually feel the road through, and no panzy ass shit like blind spot monitoring or TPMS.

Don’t want to beat up your pretty Mustang? Ford thought ahead, they put three mirrors in it, plus your head swivels to look out the side and back if need be.

Trouble ahead, no problem. It has an excellent braking system, with anti-lock, and has good, sharp steering.

My point is, people got to where they want soft cars and want no risk. Today’s cars are equal to a kid riding a Schwinn with a brain bucket strapped to his head.

Take a fuckin’ chance, will ya?!?!?!