Lane Departure Assist

[RXtoNX]

Has anyone found a way of turning this off completely? Looking through the manual it seems as though it can be done but only by a dealer, although it is not exactly clear.

I know it can be turned off after starting the engine but I usually forget until I get that steering wheel tug when changing lanes on dual carriageways etc but, more alarmingly, it also tries to pull me away from the edge of the road on narrow country lanes into the path of oncoming vehicles that I’ve moved closer to the edge for so that we can both get by without the need for one of us to stop.

Would be far more useful if that Lane Trace button on the steering wheel was a button to turn the Lane Departure Assist off & on without the need to take your eyes off the road whilst looking at and using the touch screen.
Why do we need Lane Trace Assist anyway, does it really have a purpose?

[NemesisUK]

The handbook clearly shows it is possible to turn off the function using the customisation settings

1 Select ⚙️ on the center display.
2 Select [Vehicle customise] or [Driving assist].
3 Select the item to change the settings of from the list.

[RXtoNX]

That worked fine on my previous RX but doesn’t turn it off permanently on the NX450, which is what I’m trying to do (unless I’m missing something).

The only setting I can see is “Alerts” which can be changed from vibrate to beep.

I’ll have another look 

[NemesisUK]

Perhaps you have these set to On in the My Settings function?

Each time you enter the car with the key fob the car will restore the settings to those linked with the fob

How to enable/disable this is detailed in the Multimedia handbook. Might be worth a look?

Touch [⚙️ ] from the main menu.
2 Touch [ ](User profile name or vehicle name) or [ ][Guest] on the
submenu.
3 Select the desired item.

[RXtoNX]

Thanks Peter, I must admit I’ve not tried to programme desired settings to the fob & set a profile after reading the difficulties that others have had.

Gives me something to play around with tomorrow 👍

[Al D-Much]

That seems a step backwards.
On the previous model LDA was deselected as standard.
If you wanted to use it you just pressed the button on the steering wheel. And when it was off, it stayed off.

Nanny state! etc. blah.

[NemesisUK]

27 minutes ago, Al D-Much said:

That seems a step backwards.
On the previous model LDA was deselected as standard.
If you wanted to use it you just pressed the button on the steering wheel. And when it was off, it stayed off.

Nanny state! etc. blah.

Possibly because it became mandatory on new cars from 2022

Mandatory
It is currently only mandatory on trucks and buses registered since 2015. It will not be mandatory on passenger cars and vans until July 2022 for new approvals, and 2024 for new registrations.

https://www.fundacionmapfre.org/en/education-outreach/road-safety/adas-systems/types/lane-departure-warning-and-lane-keeping-assist/

https://www.interregs.com/articles/spotlight/eu-regulation-on-emergency-lane-keeping-systems-published-000229

[Al D-Much]

8 minutes ago, NemesisUK said:

Possibly because it became mandatory on new cars from 2022

Mandatory
It is currently only mandatory on trucks and buses registered since 2015. It will not be mandatory on passenger cars and vans until July 2022 for new approvals, and 2024 for new registrations.

https://www.fundacionmapfre.org/en/education-outreach/road-safety/adas-systems/types/lane-departure-warning-and-lane-keeping-assist/

https://www.interregs.com/articles/spotlight/eu-regulation-on-emergency-lane-keeping-systems-published-000229

I refer you to my previous post

"Nanny state! etc. blah."
I'll be sticking with the older cars then. Things were much better then, no lane assist, no lines blurred.
When men were men, and women were men!

[RXtoNX]

Mandatory it maybe but, as I mentioned previously, it is also dangerous when it considers that you are too close to the edge of a narrow country lane and tries to pull you away and into the path of the oncoming car which is the reason as to why you moved closer to the edge in the first place.

There are many so-called safety features on a Lexus that I can easily debunk but I continue to own & drive one because they are such nice cars other than the over zealous built in & unnecessary safety features.

I need to complete the long Lexus questionnaire which they sent to me so will be detailing quite a few of these frustrating and unnecessary feature on there

[NemesisUK]

A bit like the compulsory speed limiters that will be making an appearance soon, these 'safety systems' should all be on by default but they can all be disabled, even if only for the duration of the journey 

I'm not a fan of all these functions IMHO they can promote laziness and a lack of concentration in the driver. No matter if the handbook reiterates time and time again these are driver aids and the driver is always responsible for driving safely....

[RXtoNX]

I agree with much of that Peter but one example of a self imposed “safety” feature which always annoyed me on the RX & still remains on the NX & cannot be disabled is the fact that once the car is out of Park mode the memory buttons on the drivers door are disabled.

My dealer suggested that this a safety feature in case you accidentally press one whilst driving (how this is possible still remains a mystery to me). 

It annoys me because for the past 15 years of driving I like to have 2 settings, one for town driving where I sit higher and more upright for better visibility in traffic and one for cruising where I sit in a more relaxed position. A simple press on position 2 or 1 is all that it used to take but with a Lexus, because of this “self imposed safety feature” I have to fiddle with the seat whilst driving.
I know which is the safer option🙄

[RXtoNX]

Well, after 2 hours of trying (and in the process managing to flatten the 12v Battery😠) I’m no further forward.

Key profile set up with the LDA turned off but it does not memorise this and after ignition turned off & back on the LDA is on again.
I’ll take a trip to the dealers this week to see if I’m doing anything wrong but I suspect that it cannot be permanently turned off. When going through the personal settings there is no option in the Drivers Assist setting to disable.

[Harrier Man]

5 hours ago, NemesisUK said:

A bit like the compulsory speed limiters that will be making an appearance soon, these 'safety systems' should all be on by default but they can all be disabled, even if only for the duration of the journey 

I'm not a fan of all these functions IMHO they can promote laziness and a lack of concentration in the driver. No matter if the handbook reiterates time and time again these are driver aids and the driver is always responsible for driving safely....

I would worry about compulsory speed limiters. Several times in the last few days the speed limit icon on the dash has shown the wrong value; 40mph when I'm on a 60mph road, 60mph when on a dual carriageway. If this same information is used for the speed limiters, there are going to be a lot of frustrated drivers and likely quite a few accidents caused by faulty software too.

[PDM]

44 minutes ago, Harrier Man said:

I would worry about compulsory speed limiters. Several times in the last few days the speed limit icon on the dash has shown the wrong value; 40mph when I'm on a 60mph road, 60mph when on a dual carriageway. If this same information is used for the speed limiters, there are going to be a lot of frustrated drivers and likely quite a few accidents caused by faulty software too.

Malcolm,  this is disappointing to hear.  My 2021 RX has Lexus safety system 2+ and it often gets speed restrictions wrong on motorways (from overhead gantries).  I had thought that LSS3+ that you have on the  new NX would have been a lot better than the version 2 system, but it does not sound too promising...

Paul

[NemesisUK]

All you wanted to know about limiters...

https://www.confused.com/car-insurance/guides/speed-limiters-mandatory-on-new-cars

"The ETSC says that the technology used in ISAs has a high level of accuracy. It has the ability to detect temporary speed limits, digital signs and overhead signs.

ISAs also have an in-built function which means it can detect over-the-air updates to speed limit information.

But ultimately, the car’s speed is the driver’s responsibility, The ETSC says: “ISA is a driver assistance technology: the driver, not the car, is responsible for obeying the current speed limit at all times.”

 

[Al D-Much]

16 hours ago, Harrier Man said:

I would worry about compulsory speed limiters. Several times in the last few days the speed limit icon on the dash has shown the wrong value; 40mph when I'm on a 60mph road, 60mph when on a dual carriageway. If this same information is used for the speed limiters, there are going to be a lot of frustrated drivers and likely quite a few accidents caused by faulty software too.

Yep happens to me in my 2020 NX.
Certain parts of mu commute the onboard map shows the correct speed limit, but the dash gizmo thinks that I'm in a 30, when it's 40, 20 when in a 30, but the worst one, for no particular reason on one stretch it's 30 through town, and for 1/2 a mile it thinks I'm in a 10!

Imaging the braking from 30 down to 10 on a limiter, pile up ensues !!!!!

[RXtoNX]

Just coming back to the Lane Departure Assist query, Lexus technical have confirmed that it is not possible to permanently disable this feature due to it being classified as an important safety feature.

Apparently taking your eyes off the road to fiddle with the screen mid journey to disable it is not considered to be a negative safety issue, nor is the car trying to pull you into the path of oncoming vehicles on narrow country lanes 😮🤔

[Moleman]

32 minutes ago, RXtoNX said:

Just coming back to the Lane Departure Assist query, Lexus technical have confirmed that it is not possible to permanently disable this feature due to it being classified as an important safety feature.

Apparently taking your eyes off the road to fiddle with the screen mid journey to disable it is not considered to be a negative safety issue, nor is the car trying to pull you into the path of oncoming vehicles on narrow country lanes 😮🤔

That is disappointing to learn, the previous system which gave you the choice from start up was better I believe. Not all progress is better.

[Mattsneaker]

For me i find it dangerous when going around a parked vehicle and the wheel trying to turn you back TOWARDS the parked car. I try to remember to turn it off first thing every time i start a journey

[Harrier Man]

On 10/15/2022 at 3:55 PM, Harrier Man said:

I would worry about compulsory speed limiters. Several times in the last few days the speed limit icon on the dash has shown the wrong value; 40mph when I'm on a 60mph road, 60mph when on a dual carriageway. If this same information is used for the speed limiters, there are going to be a lot of frustrated drivers and likely quite a few accidents caused by faulty software too.

Found this description of the regulations on Intelligent Speed Assistance Systems (ISAS). Happy to read that the ISAS can be overriden but worrying that manufacturers can choose to fit a system that automatically reduces a vehicles speed; this seems crazy and a recipe for accidents since an ISAS only needs to be accurate 90% of the time over a 400km test distance. Full article at https://www.interregs.com/articles/spotlight/eu-regulation-on-intelligent-speed-assistance-systems-published-000236