Yep, the LTA with Lane Centering activated definitely seems to keep the car close to the centerline. I disengage both when on a two lane road as it seems the car wants to get a little too close to the oncomeing traffic. I use LTA and the lane centering on roads with two or more lanes in my direction.

 

No mine works good

Philip
2019 ES300h UL eminent white pearl/chateau
2019 NX300h L eminent white pearl/crème
gone
2016 ES300h UL eminent white pearl/parchment
2015 NX300h L atomic silver/black

 

Do you find that having LTA and Lane centring causes the steering to be heavier? And greater undsrsteer? I do.
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A lot your experience with any lane keeping assist or other (semi) automated driving features is going to depend heavily on where you live and drive. Road conditions and markings unfortunately can vary greatly, which is actually a huge impediment that nobody brings up in the automation discussion. A driver in California might have a totally different experience from one in Pennsylvania or Ohio.

I'm in the Cleveland area and for me LTA is virtually useless. ODOT and lots of cities here use strips of tar drizzled on the roads and highways to prolong the life of the asphalt and that really messes up Lexus' system, as the cameras confuse those stripes for lane markers. When I've played around using LTA, it's more work than leaving it off. It's hit or miss on the Ohio turnpike, and worthless on Michigan roads where there may or may not be any sort of lane markers at all for periods...or better yet, conflicting lane stripes they never bothered to tear up from the last construction project!

But back to the original question, yes if LTA is on in my ES it can sometimes want to pull too far left over the lines (usually cause there is a tar stripe in the next lane) or it often wants to bounce between lines too. So I leave it off 99% of the time.

 

Yes i havs now turned it off.
My next project is to work out why my steering feels so heavy. The demo car I tested with was not. The demo car had Bridgestone tyres but my car came with Dunlop Also my car done 7000 miles as it was a pre ownwd so maybe it needs the wheels rotated and aligned?

 

You can turn off the "Lane Centering" function. So you can still use LKA and radar cruise at the same time without it always trying to keep you in the center of the lane.

 

Conveniently located too, right side of the wheel.

Are there any other features of the "steering assist function" besides lane centering?

 

The steering wheel LTA switch you're pointing out is to turn the whole LTA system on or off. What offroad200 is discussing is selectively turning off or on individual sub-functions of the LTA system. You control the LTA system's individual sub-functions in the multi-information display's vehicle settings menu entry items.

The owner's manual documents lane centering in a separate section from steering assist. As documented, steering assist includes what could be termed steering nudging to keep the vehicle in the lane (provided certain conditions are satisfied) and if equipped with Blind Spot Monitor to nudge the vehicle from colliding with a vehicle in a blind spot during lane changing.

 

You explained it very well.

 

I turn off my LKA using the steering wheel switch when on country roads with minimal or no line markings as the system just tugs the wheel. I was causing fatigue. I leave it on in the city and suburbs. It works well for me.

 

I've kept the Lane Centering "off" but have the others active.

I just wish the HUD would show the compass as well as the lane guides. You lose the compass when any portion of the LTA is engaged.

 

I have had my 2020 f sport for a little over a month and have already put nearly 2k miles on it. I have had some type of automatic/radar/camera based cruise control in all my cars since my 2012 MB CL so I am very used to the technology, its pros cons and quirks. I drive mostly highway and almost always use the lane keep assist on my lexus.

I cant comment on the most modern BMW or MB tech, but the car I am coming from is an Audi S5 sportback which really promoted their Lane Keeping abilities when the car came out a few years ago. It definitely was less deliberate in its operation, but it was also an extremely expensive package in a car that is priced about 20% higher than my new f sport. That being said, it was also not perfect. Highway lane merges (think right lane when an on ramp lane merges with the right lane and for a brief period of time the lane is "wide") are handled much better in the Lexus in terms of when it loses site of a lane and regroups to lock on again. The Audi would every so often freak out on this regular driving occurrence. I do wish the close quarters braking was smoother on our car. In stop and go the system isnt very comfortable as it has a tendency to inch up to the car and then slam the brakes to a stop in the last 5mph. However, I think its very fair to say that for the price of the technology, the Lexus does this extremely well. Others may do it better but for a higher cost (and german cars that are being compared in this thread have had the tech in their stable a lot longer). I am not crazy about my Lexus HUD either, but it was $500. I know for some that is an expensive option, but considering I paid $3500 for just my HUD in my 2009 BMW X5, I forgive its shortcomings.

As for the pulling to the left issue while using lane keep assist, I have some unique input on this issue in only a month's time of ownership. Long story short, when I test drove my car there was a lot of vibration in one of the tires and we chalked it up to the car sitting at the lot for a long time. This was not the case, in fact my car just spent a week at the dealership until they sorted out that 3 of my tires had flat spots and the alignment was slightly off. No big deal, the dealership took care of my like a champ. However, my lane keep is a lot smoother now and the car tracks better. Where as before I would agree the system was extremely left-line bias, the car definitely does not fight me as much while in full auto cruise. I keep a loose grip on the wheel during full auto cruise, and prior to the tire and alignment fix it was definitely pulling a lot. The difference was dramatic enough that for the first few days this week with the car back I was wondering if it was even working.

I realize alignment and tires arent something you can just "check" at home, but a lot of places will "check" these things during routine service as well. I'm not saying its a fix for everyone, but I can tell you my car was off and now its definitely not experiencing the ping pong effect anymore.

 

Thanks for the suggestion. I know my car had a front collision prior to my purchase by the previous owner. I might get an alignment done.
i don't drive on the highway much but when I do the lane keep works well there.
Agree the auto braking is harsh at times. It came from a German built Buick Regal where it was super smooth and gentle.
I find the HUD to be ok. It could be brighter but that's all.

 

car pulling to left while CC is on

 

car pulls over center line, so to the left constantly but more so when CC is set. Very dangerous on 2021 NX 300 HYBRID