Safety systems: Intelligent Speed Assistance, LDA, etc

[Cyker]

Older Toyotas could too - I think as the regulations are tightened up the manufacturers have to follow suit  

 

[AndrueC]

Both of those default to off on my '19 Corolla. It's a significant factor that is helping me hold off from replacing my car.

[Alan3]

50 minutes ago, Cyker said:

Older Toyotas could too - I think as the regulations are tightened up the manufacturers have to follow suit  

What the legislation says at the moment is:

Quote

It shall be possible for the driver to manually deactivate the ISA system, either fully (i.e. the SLIF and SLWF, or SLIF and SCF), or partially (i.e. the SLWF or SCF).

The manufacturer may provide the possibility for the driver to manually and partially deactivate the SLWF to do either of the following:

(a) provide an active visual warning function, but without audible or haptic warning; or

(b) terminate a single instance of the SLWF audible or haptic warning.

and

Quote

Following manual deactivation of the ISA system, it shall be possible for the driver to re-activate the system with no more than the number of actions required to deactivate it.

There's nothing stopping it being a single button press.

Another sore point, since the speedometer of my car is about 10% optimistic so I get warnings when I'm well below the actual speed limit, is the fact the following is included in the legislation:

Quote

The vehicle manufacturer may provide for an automatic or manual vehicle speedometer calibration function to minimise the discrepancy between the speedometer speed and the true speed of the vehicle e.g. after tyre replacement, as long as it is ensured that the requirements of UN Regulation No 39 1 are always complied with. In addition, the vehicle manufacturer may take into account a tolerance of up to 3.0% as regards the perceived speed limits used to activate information and warnings.

There's a post elsewhere on this forum where someone asked Toyota if they had any plans to implement such a system and got told "No".

[Cyker]

Is that UK, EU, NCAP or other legislation?  

[FROSTYBALLS]

Similar topics merged

[sportse]

Yes, I’d asked Toyota customer services about altering the speedometer on my auris hybrid because it was 10% out, so 70mph on the dash was only 63mph in reality. 
 

they told me it wasn’t possible to alter the speedometer unfortunately. 
 

I see Dacia has only two taps of a button on the dash to disable the safety warning on the new duster, so it’s certainly possible to have the systems being easy to disable. 
 

in theory it would be possible for Toyota to update their software, but I doubt they will. 

[Paul john]

22 minutes ago, sportse said:

Yes, I’d asked Toyota customer services about altering the speedometer on my auris hybrid because it was 10% out, so 70mph on the dash was only 63mph in reality. 
 

they told me it wasn’t possible to alter the speedometer unfortunately. 
 

I see Dacia has only two taps of a button on the dash to disable the safety warning on the new duster, so it’s certainly possible to have the systems being easy to disable. 
 

in theory it would be possible for Toyota to update their software, but I doubt they will. 

So do volvo and ford imho

all hire cars i have driven are 10% out so its not just a toyota issue.

[Cyker]

vs GPS and most speed displays, all my cars have read exactly 2mph above real speed, which I am absolutely fine with! I like having that mental buffer...

 

[Heidfirst]

2 hours ago, Cyker said:

Is that UK, EU, NCAP or other legislation?  

most likely UNECE

 

35 minutes ago, Cyker said:

vs GPS and most speed displays, all my cars have read exactly 2mph above real speed, which I am absolutely fine with! I like having that mental buffer...

 

all 3 of my previous Toyotas have been ~6% out at 70mph

[fred88]

It's not a fixed figure that they're out by its a percentage of the speed you're doing.

[fred88]

... and it's a "feature" of all speedometer and has been for many years. The only exceptions are tachometers on commercial vehicles which are bang on. Which is why they're all overtaking us in average speed zones!

[FROSTYBALLS]

1 hour ago, sportse said:

I’d asked Toyota customer services about altering the speedometer on my auris hybrid because it was 10% out, so 70mph on the dash was only 63mph in reality.

Within the legal tolerance.

[Cyker]

Huh, weird, all mine have been exactly 2mph out, even at motorway speeds according to GPS

[sportse]

36 minutes ago, Cyker said:

Huh, weird, all mine have been exactly 2mph out, even at motorway speeds according to GPS

I had a Volvo that was the same, a constant 2mph out whether you were at 30 or 70. 

[Alan3]

3 hours ago, Cyker said:

Is that UK, EU, NCAP or other legislation?  

It's EU: https://eur-lex.europa.eu/legal-content/EN/TXT/HTML/?uri=PI_COM:Ares(2021)2243084

[Dylanfan]

Could be set 2 mph high to ensure you don’t get caught & if you did, it’s your fault, not there’s. You can’t sue them🤣

[Cyker]

That's indeed the basic reason - Same logic as why a baker's dozen being 13 instead of 12 exists!