Re: Speed limiters

On 2024-07-06 08:23, Martin Brown wrote:

On 06/07/2024 00:28, Don Y wrote:

Article in /The Guardian/ suggests these are already (optionally)
present in EU vehicles and soon to be *mandatory*?

 They have been present as hard limits on HGVs for some time. Most HGVs are limited at 56mph in the UK. Some commercial delivery vehicles also have a true speed limiter and a little notice on the back to say what their maximum speed is.
 

But, it seems that these don't truly *limit* speed; rather, they
signal when the speed limit has been *exceeded*.

 My car signals when I exceed the posted speed limit based on GPS info and online data. It doesn't always get it right for example when there is a motorway with a 70mph limit and an old urban road (30mph) running parallel. It flashes the limit sign for a while if you are over it but then backs off.
 In Japan a lot of cars have a little bell that rings incessantly when you go faster than 100kph. Introduced I think around the late 1980's. AFAIK that feature is physically present in UK made Japanese vehicles but is not enabled in the UK.

And, can be disabled?

 Probably (anything can with the right after market reprogramming). I have the haptic feedback on mine disabled from the config menu.
 

Do vehicles "tattle" on drivers that exceed the limit?  Or, is it
intended as a reminder (nag!) to help people drive more safely?

 Potentially the airbag black box could reveal if you have been driving over the speed limit in the event of an airbag triggering collision - they store the last however many seconds just prior to impact to show that their decision to detonate was justified.
 If you have been driving *very* quickly then the average speed log might also give the game away too. Record police speeding catch on the fast section of road near me was 144mph during Covid lockdown.
 https://www.thenorthernecho.co.uk/news/local/northyorkshire/10979148.camera-data-reveals-a19-speed-blackspot/   A plod was done for 154mph fairly recently (I think on another road).
 

My next car will be a 1972 Chevelle.
Cheers
Phil Hobbs
--
Dr Philip C D Hobbs
Principal Consultant
ElectroOptical Innovations LLC / Hobbs ElectroOptics
Optics, Electro-optics, Photonics, Analog Electronics
Briarcliff Manor NY 10510
http://electrooptical.net
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