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From: Hibou <vpaereru-unmonitored@yahoo.com.invalid>
Newsgroups: sci.lang,alt.usage.english
Subject: Re: OT: Converting miles/km
Date: Sat, 21 Sep 2024 08:51:54 +0100
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Le 21/09/2024 à 08:45, Bertel Lund Hansen a écrit :
> Hibou wrote:
>>
>> "However, our experience of such systems suggests they can get it wrong.
>> In one instance, a car's traffic sign recognition system picked up a
>> 30mph sign on a turning off a dual carriage and dramatically slowed
>> down, despite the fact the car was actually travelling along the outside
>> lane"
> 
> My father has some friends who steadily run into that problem on the
> road that they use every day.
> 
> When you say that the system is mandatory in EU, does that mean that we
> are not allowed to disable it? I select speed according to my gps, and
> that is 5 kph faster than the speedometer reading. It's pretty much been
> the same with every car that I rented before I bought one.

Yes, car speedos are allowed to over-read but not under-read. GPS is 
more accurate (except in tunnels).

It seems you can disable the speed limiter, but you have to do that 
every time you start the car (and the maker may perhaps bury the option 
several menus down).