Lane keep assist is garbage (actually Lane Folow Assist is garbage)

[Devin]

At least on my car, I can't get it to stop pinballing between the lines. I'll turn it on with smart cruise and after a few sweeping turns in the highway it'll drift back and forth between the lines, getting more and more aggressive each time until it either settles down or I yank the wheel to get it to center. It also has the habit of entering a turn on the inside and ending near the outside, which is particularly aggravating when I have another car at 10 or 2 o'clock.

Even worse, there is very little notification that LKA LFA is no longer functioning aside from the steering wheel icon turning white and possibly a chime, but if there is a chime I didn't use it this morning.

I know it is not self-driving, but it actually takes more mental energy to use the system than it does to drive by hand.

This is sort of just a rant, but is this others' experience with it as well?

 

[JSolo]

Pulled over for a dui, "It was the LKA, not me officer."

I think the quality of the lines and road determines how much it ping pongs. To me all of this is mostly a gimmick. Adaptive cruise control could be useful, but if there's heavy traffic one shouldn't be using cruise any way.

 

[AtomicGTL]

Depends if you see both white lines,. you're good. Also its only useful on highways during the day.

Use them with precaution just like anything else. Useful for me for long day road trips. Especially if Im snacking/drinking coffee

 

[StingertimeNC]

I think of it as basically an assist if I get distracted for a second. It will kind of save you if you get close to the edge. It's not something to rely on all the time though. I've noticed it goes wonky if you are passing a highway exit too, like it senses a gas station and wants to go there, lol.

 

[Devin]

I think of it as basically an assist if I get distracted for a second. It will kind of save you if you get close to the edge. It's not something to rely on all the time though. I've noticed it goes wonky if you are passing a highway exit too, like it senses a gas station and wants to go there, lol.

It drives like it's had too much to drink!

 

[SanDiegoBlue]

Are you sure you have lane follow on? What you are describing sounds like lane keep. Do you see the green steering wheel icon on the dash? If not hit the lower left button on the right side of the steering wheel and try again. It works quite well for me (until it doesn't)

 

[Devin]

Yes. It's green usually, and then it turns white when it throws it's "hands" up in the air and gives up.

 

[Dan00Hawk]

Lane Keep Assist (button on the far left side) will ping pong you between the lines. I turned that one off to just a audible warning for lane departure warning.

Lane Follow Assist (steering wheel button on the right side of your steering wheel, green steering wheel on dash) will do a better job of keeping the vehicle centered in the lane. It still sometimes gives a little sway that wants you to hold the wheel steady once in awhile.

See this for a more thorough explanation.

 

[Devin]

Just to clarify, I'm using the steering wheel button, which is lane follow assist.

To be abundantly clear:


Thanks for the heads up, I edited my post.

 

[Dan00Hawk]

I had to look up the terms myself before posting, because I wasn't certain either. I just think of them as "the little steering wheel button that tries to sometimes keep the car centered" and "the other button that annoyingly lets me know if I go out of the lane without signaling"

But yes, the sway that happens every so often would be enough to make me carsick. Holding the wheel firmly with my knee or hand is the only solution and then it works well again for awhile. I certainly don't trust it for going around curves, although I have let it do it on its own. I also don't like it when passing other vehicles, as I want a little more breathing room than it provides.

 

[JSolo]

How did we drive cars a decade (or even 5 years) ago without this "feature"?

Watch...... future cars will come without steering wheels.

Btw, that canuck guy from the video above reminds me of Matt Frewer.

 

[oddball]

I'll agree that the implementation (at least on my 2018) is garbage. It'll ping-pong regardless of the condition of the lines or the visibility, and it'll follow the right line no matter what. Cruising in the right lane and there's an exit? Well, you're taking that exit!

I'm curious about that button on the steering wheel. The 2018 doesn't have that. Maybe they did a rev of LKA/LFA after 2018? I would certainly hope so!

 

[SanDiegoBlue]

LFA was not in the 2018, thus no button. The LKA is not intended to keep you in the center of the lane, just to keep you in the lane if you have a momentary lapse of concentration. The LFA in newer models is intended to keep you in the center of the lane. It works well in my opinion if the lanes are well marked (both sides) and there are no distracting marks on the road. Here in San Diego, the freeway lines (where this works best) are painted white with black between, so very high contrast.

 

[Devin]

LFA was not in the 2018, thus no button. The LKA (Lane Keep Assist) is not intended to keep you in the center of the lane, just to keep you in the lane if you have a momentary lapse of concentration. The LFA in newer models is intended to keep you in the center of the lane. It works well in my opinion if the lanes are well marked (both sides) and there are no distracting marks on the road. Here in San Diego, the freeway lines (where this works best) are painted white with black between, so very high contrast.

Do you use LFA with LKA?

 

[SanDiegoBlue]

LKA may be used by itself, but when LFA is turned on, LKA is automatically turned on -- they work together.

 

[Devin]

Just wondering because there is no icon for it.

 

[selfDrivingGT2]

I played around with the stock LKA for a few hundred miles before installing after market self driving(open pilot). Stock it seemed pretty comparable to some Toyotas and Benzs I had driven. However in stock form it leaves a lot to be desired. My biggest complaint is that it doesn't display any sort of warning or make a noise when it loses track of the lane lines.

 

[killinghall]

Someone please ELI5 how LFA works? When I press the button on the steering wheel the icon lights up, press it again it blinks, press it again it disappears. What does all this mean and how does LFA work with LKA‽

 

[Redleg94]

At least on my car, I can't get it to stop pinballing between the lines. I'll turn it on with smart cruise and after a few sweeping turns in the highway it'll drift back and forth between the lines, getting more and more aggressive each time until it either settles down or I yank the wheel to get it to center. It also has the habit of entering a turn on the inside and ending near the outside, which is particularly aggravating when I have another car at 10 or 2 o'clock.

Even worse, there is very little notification that LKA (Lane Keep Assist) LFA is no longer functioning aside from the steering wheel icon turning white and possibly a chime, but if there is a chime I didn't use it this morning.

I know it is not self-driving, but it actually takes more mental energy to use the system than it does to drive by hand.

This is sort of just a rant, but is this others' experience with it as well?

On my '22 GT1 I don't see the same issues, at least on the interstate. as long as I keep a light. but steady, hand on the wheel the car stays centered in the lane and I can feel it actively steering around bends as long as both LKA and LFA are on. Do you have BOTH icons on the dash (steering wheel for LFA and the car in the lane for LKA)? Remember, LFA needs to turned on each time you start the car, it defaults to off.

 

[stingerjames]

At least on my car, I can't get it to stop pinballing between the lines. I'll turn it on with smart cruise and after a few sweeping turns in the highway it'll drift back and forth between the lines, getting more and more aggressive each time until it either settles down or I yank the wheel to get it to center. It also has the habit of entering a turn on the inside and ending near the outside, which is particularly aggravating when I have another car at 10 or 2 o'clock.

Even worse, there is very little notification that LKA (Lane Keep Assist) LFA is no longer functioning aside from the steering wheel icon turning white and possibly a chime, but if there is a chime I didn't use it this morning.

I know it is not self-driving, but it actually takes more mental energy to use the system than it does to drive by hand.

This is sort of just a rant, but is this others' experience with it as well?

Mine has been relatively fine. I've actually tried to stress test it a bit. At moderate speeds ~50-65 mph, LFA won't keep in a turn. It'll release the wheel back to you (most likely mid-turn) if your hands aren't helping the turn. Anything lower in speed, normally, it'll force the vehicle in the center, when using it with LKA (making the turn) and will proactively turn the wheel for you. I normally turn it off because I'm used to turning a bit late, and I end up fighting with the LFA regularly. It is useful though for driving when lazy at moderate or constant speeds. I wouldn't trust it much at "fast" highway speeds, or, on roads with low maintenance/faded lines. '22 model works great for me, but LKA will ping pong me a bit, but LFA will keep me mostly center, as long as my speeds are at the "responsible adult level".