Not all degree 2 driver assists are equal, IIHS finds after testing


Not all adaptive cruise management and lane preserving techniques are created equal. That ought to be apparent, however in case it is not, current assessments by the Insurance Institute for Highway Safety will function proof. On Tuesday, IIHS printed the outcomes of some street and observe testing with a number of completely different makes of car, measuring how properly every was capable of keep inside its lane round corners and up hills.

“We zeroed in on situations our staff have identified as areas of concern during test drives with Level 2 systems, then used that feedback to develop road and track scenarios to compare vehicles,” mentioned IIHS Senior Research Engineer Jessica Jermakian. By “level 2,” Jermakian means automobiles which are able to steering, braking, and accelerating for themselves however solely with an engaged human driver behind the wheel who’s chargeable for offering situational consciousness.

The automobiles (and superior driver help techniques) that IIHS examined had been a 2017 BMW 5 Series (Driving Assistant Plus), 2017 Mercedes-Benz E-Class (Drive Pilot), 2018 Tesla Model 3 (Autopilot 8.1), 2016 Tesla Model S (Autopilot 7.1), and 2018 Volvo S90 (Pilot Assist). IIHS notes that every had beforehand been scored extremely for his or her automated emergency braking (AEB) techniques. A collection of observe assessments was used to ascertain how every system coped with avoiding collisions with a stationary automobile, then repeated street testing was performed to get a way of real-world conduct in visitors and the way properly every automobile maintained place inside its lane.

Adaptive cruise management and braking for stationary vehicles

In the primary collection of assessments, all the automobiles efficiently prevented a collision when confronted with a stationary automobile whereas touring at 31mph, with the Volvo braking essentially the most aggressively, just like its AEB activation. (Interestingly, each Teslas struck the stationary automobile within the AEB check.) Encouragingly, all the automobiles prevented hitting a stationary object when following a lead automobile that all of the sudden modified lanes—this precise “cut-out” state of affairs was flagged as being outdoors the operational area for many superior driver help techniques (ADAS) within the NHTSA investigation right into a deadly 2016 Tesla crash in Florida.

The efficiency wasn’t fairly nearly as good in the actual world, sadly. IIHS discovered that, except for the Model 3, every automobile had events when it did not cease for a stationary automobile forward (which is why it is so necessary for the human driver to at all times be paying full consideration to the street). The Model Three truly suffered from the precise reverse downside; as an alternative of false negatives it was delicate to false positives, unexpectedly slowing on 12 events, seven of which had been for tree shadows on the street. While that is in all probability annoying for the driving force, I’ll gladly take a false optimistic over a false unfavourable underneath these circumstances.

Lane maintain help

The 5 automobiles had been additionally examined to see how properly their lane maintain help capabilities labored on curves with three completely different radii. Again, the Model Three stood out: it was the one automobile to remain inside its lane each time the assessments had been repeated. IIHS famous that the BMW, Volvo, and Mercedes-Benz didn’t present “enough steering input on their own to consistently stay in their lane, often requiring the driver to provide additional steering to successfully navigate the curve.”


Real-world driving with curves and hills tripped up all the automobiles apart from the Model 3, as you possibly can see from the desk above. BMW’s system seems to be essentially the most flustered by elevation modifications, though hills additionally induced the Model S to stray outdoors its lane comparatively typically. However, it is essential to notice that IIHS says it isn’t prepared to start out formally shopper score the efficiency of those numerous techniques. For that, far more testing is required.

We will definitely welcome it when extra of that knowledge turns into out there. On a number of events, readers have requested us to place collectively a bunch check of various ADAS implementations, however it’s the kind of mission that shortly requires numerous time and sources if you wish to do it correctly.

Perhaps one of the best try to date was the one performed by our good friend Alex Roy over at The Drive again in 2016. But two years is a very long time on this area. Even inside a single OEM’s vary, it is doable to search out fairly completely different efficiency between completely different fashions, and the older the system, the much less succesful it’s, by and enormous. In the meantime, whether or not you drive a Tesla or a Toyota, if you are going to use adaptive cruise and lane preserving, simply keep in mind: it is at all times your job to maintain your eyes on the street.

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