Speed limiter (ISA = Intelligent Speed Assistance)

[TonyLexus]

I'm a little confused, and the web doesn't answer the question - do new Lexus models all now have ISA? This being the system that reads from road signs and GPS and resists (but doesn't stop) exceeding a speed limit. I have a new RX450h+ on order, built in May and due for delivery in next few weeks.

Thanks in advance

Tony

[GSLV6]

Yes.  Should be on all new models.  I have it on my 4th gen.  It basically raises alerts, with the posted speed limit showing on the HUD, which turns red if you exceed the S/l, but also triggers an annoying alarm bell, which thankfully can be toggled off in the menus.  The EU are introducing mandatory limiters in all new cars which physically limit speeds using RSA cameras together with GPS, but defeatable within the menu system, so you can exceed the limits at your own risk.  Personally, I think there's far too much interference in personal freedoms and whilst I'm not condoning speeding, I strongly object to the one state EU trampling personal freedoms as whatever is bound over within the EU gets bound over here too in relation to motoring and car manufacturing requirements.

[TonyLexus]

Thanks Paul, but therefore your car doesn't have the full-blown ISA. You say it has an audible and visible system but ISA can also physically slow the car and/or show a resistance at the pedal (I think ISA does anyway).....which you can accelerate through, at the pedal. Do all new Lexus car models now have this latter system installed??  

Edited Sunday at 12:20 PM by TonyLexus
correction

[Barry14UK]

All new cars or those in the showroom awaiting sale have to be fully compliant. The European block wanted it and I suppose it was hard for UK to opt out of what was seen as a safety measure.  I read that you can override the system but that you have to do this for every journey. 

[TonyLexus]

Thanks Barry. There are three main types of speed limiters, each with a distinct mode of operation:

Informative or Advisory ISA: Warns the driver by displaying a symbol or alert when the speed limit is exceeded, reminding them of the legal limit.

Supportive or Warning ISA: This adds resistance to the accelerator pedal, making it harder to press down when driving over the speed limit.

Intervening or Mandatory ISA: This system automatically reduces engine power if the vehicle exceeds the speed limit, ensuring a gradual reduction in speed without using brakes. This system is akin to cruise control, maintaining the legal speed limit.

It appears, though I can't confirm this, that the law will allow single systems, or combinations, of the above.

My question is what have Lexus adopted for new cars for 7 July 2024?