First let me say I am highly experienced with lane keeping assist and lane centering systems. I have had both types on my Hondas, Fords and my new Tesla. So our first road trip took place this last weekend from Orlando to Atlanta. I finally was able to settle in and use the cruise control and eyesight. On the new 2021 models it is actually a lane centering system. While using the lane centering system, I keep my hands on the wheel as required. About 1 hour into the trip I notice the system is trying to pull to the right even though I am centered in my lane. It feels like a lot of pressure on the steering which is strange. Suddenly I sneeze and let one hand off the steering wheel and the Ascent VIOLENTLY pulled to the right and went over the markers into the right lane (I was in center lane of 3 lane freeway). Is was terrifying! Had a car been in that lane I would have hit it. So now being more prepared I try to replicate it. And again it happens! I feel a sudden build up of pulling to the right and with hand relaxation in my steering grip the Ascent wants to violently overcorrect to the right paying no attention to lane markers. I finally had to turn off the lane ceneting function. I had my daughter record a video that I will take to Subaru to have it checked out but I already know this will not be a simple fix.
2021 Ascent Touring Almost Killed Me!
gator 2021
41 - 44 of 44 Posts
The other day I received a lane departure alert in the conditions shown in the photo below. The car must have picked up the tar line running parallel to the dashed white line and though that was the lane paint. As soon as that repair tar started, the car thought I was leaving the lane, and it did the beep thing with the graphic.
I post this to show an example of what Eyesight thinks is a lane. The software scans and does its best to decide what the "lane" is. Usually that's fine but sometimes it sees something else and thinks that's the lane's edge. Had I been using Lane Centering (I have a 2021), and I encountered this area, perhaps it would have turned the car as the original poster described, and tried to position me in the new "center" of the tar line/fog line lane.
![6330]( "6330")
I post this to show an example of what Eyesight thinks is a lane. The software scans and does its best to decide what the "lane" is. Usually that's fine but sometimes it sees something else and thinks that's the lane's edge. Had I been using Lane Centering (I have a 2021), and I encountered this area, perhaps it would have turned the car as the original poster described, and tried to position me in the new "center" of the tar line/fog line lane.
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Possibly. I've had that happen with Lane Centering and Lane Keep Assist. But, that's noted in the manual as something that may happen. I've never been unable to overpower the system with the most minimal effort. I believe the issue noted was lack of steering by the human.
LDW will very often report tar strips like that in our 2020 model. As discussed here prior, though, LKA (and I presume LC as well) require a much higher confidence score than LDW does. This is readily observed by having LKA turned on and driving around town watching the graphic between the speedometer and tach. LDW will report you crossing a lane line even though LKA doesn't have enough confidence to fill in the white line on the screen and steer the car for you. I've never had LKA appear to use or follow a tar strip or other non-lane line on the road. But I will also admit that I don't use the system very often around town, so I wouldn't say that it would never do such a thing.
With regard to the OP's experience, I had the exact same thing happen to me this past Sunday while traveling 85mph (legal limit). While on cruise control and passing an egress ramp on on a gentle left hand curve, the car decided we wanted to exit, jerking the wheel in my hand to the right. Luckily, both hands were on the wheel at the time and I was able to save it from swerving out of control. Luckily no one was hurt, just scared and a few puckered lips, but it did remind me that no matter how comfortable we get with tech, we should never trust it and always be actively driving.
BTW - Roads conditions were perfect, no weather, glare, or direct sunshine, etc.
BTW - Roads conditions were perfect, no weather, glare, or direct sunshine, etc.
41 - 44 of 44 Posts
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