This Advanced Driving Stuff.

[supermono]

WhoseGeneration said:

Really seems to annoy the majority of other drivers.
As I roll of the accelerator pedal to enter a speed limit on the limit.
As I use the car's speedometer rather than the GPS based one on my "warning thingy".

With respect you can't do both these things. By relying on the rough estimate of your speed on the dashboard, you'll be rolling off the throttle to enter a speed limit below the limit, your "warning thingy" is displaying your actual speed.

People who have somewhere to be may become unimpressed with your fabulous display of slowing them down to below the speed limit. Especially if it's one of these new PC inspired out of town 30s or whatever which used to be a perfectly reasonable 60 not so long ago.

I understand it's your right to travel under the speed limit if you wish to, but rather than being impressed by your mastery of how you can take your foot off the gas, people are liable to recognise you as a pompass slowster intent on holding them up.

SM

[WhoseGeneration]

supermono said:

WhoseGeneration said:

Really seems to annoy the majority of other drivers.
As I roll of the accelerator pedal to enter a speed limit on the limit.
As I use the car's speedometer rather than the GPS based one on my "warning thingy".

With respect you can't do both these things. By relying on the rough estimate of your speed on the dashboard, you'll be rolling off the throttle to enter a speed limit below the limit, your "warning thingy" is displaying your actual speed.

People who have somewhere to be may become unimpressed with your fabulous display of slowing them down to below the speed limit. Especially if it's one of these new PC inspired out of town 30s or whatever which used to be a perfectly reasonable 60 not so long ago.

I understand it's your right to travel under the speed limit if you wish to, but rather than being impressed by your mastery of how you can take your foot off the gas, people are liable to recognise you as a pompass slowster intent on holding them up.

SM

I shall reply to you and Vaux in the one post.
Now, I've seen Vonhosen, in posts on this 'site, tell folks to use their car's speedometer and not to rely on their GPS, ok, that may be for "safety".
Yet I think back to when Mr. and Mrs. WG undertook their IAM stuff.
We were in the habit of adding 10% to our speedometer readings, for any of the "lower" limits.
Mrs. WG was told, in no uncertain terms, by her Observer, that was not on and speedometer readings ruled.
I used our Astra GTE 16V with digital dash, great big nunbers on view.
Now, we currently live in two areas of the country that each have some of those "this is your speed" signs.
Ho hum, in our cars, using speedometers and "warning thingy", I can't decide how accurate those are.
I think some authorities "adjust" them to suit their agenda.
My GPS "thingy" says 1 second to adjust speed reading, presumably assuming an accurate fix is still on.
Oh, in this instance I ain't going to be modest, I can hit the limit at the sign, GPS or speedometer based.
The limit isn't 100 metres/yards beyond the sign.
I'm not disputing the utter stupidity of many limits either.
You argued that successfully with any Magistrates?
I would like to make it clear that my GPS "warning thingy" is only for alerting me to the presence of accident blackspots, schools and railway crossings.

Edited by WhoseGeneration on Thursday 30th August 20:25

Edited by WhoseGeneration on Thursday 30th August 21:19

[Vaux]

WhoseGeneration said:

My GPS "thingy" says 1 second to adjust speed reading, presumably assuming an accurate fix is still on.

I take a car and find a straight, level piece of road and drive at a speedo indicated steady speed (30/40/50/60/70 depending on speed limit) to get an idea how far off the speedo is.

No bends, no acceleration. The speed calcualtion is a relative thing - there is no comparison with the specific positional accuracy of simple GPS which is what +/- 15m? My old GPS has a stated velocity accuracy of 0.1 knot RMS steady state.

I've had a couple of cars very close (reading vs actual), but the current Astra is 3 mph off at 30/40/50/60/70.

And current IAM orders are to drive to the speedo.

[supermono]

WhoseGeneration said:

Mrs. WG was told, in no uncertain terms, by her Observer, that was not on and speedometer readings ruled.

Of course you must stick to whatever rules you take it upon yourselves to stick to.

My point remains that your speedo isn't correct most (if any) of the time, wheras your GPS is correct most of the time. A speedometer measures how quickly your wheels/gearbox are going it then makes a safe approximation to your speed which is proportional to that. It cannot lawfully underread therefore it errs to the side of caution displaying bigger numbers than reality. Adding 10% is just as wrong if you want to be going at a particular speed because you're still working out something proportional to your gearbox or wheels. Your GPS is measuring your change in position over time and therefore tells you precicely what your speed it.

As far as taking your foot off the throttle at the appropriate time to be going at a particular speed in the future, I don't think it impresses many people other than the IAM. I would much rather be doing 60mph for as long as reasonably possible before braking moderately down to 30/35/40/whatever is a safe speed for the bit of road I'm on because that's how to get from A-B in a bit less time.

It depends a bit on your objectives, if it's following a set of rules you've decided are important then you do it your way (as is your right) but don't be surprised when the average joe who just wants to get home in time to tuck his kids in bed fails to appreciate your skills.

SM

[WhoseGeneration]

supermono said:

but don't be surprised when the average joe who just wants to get home in time to tuck his kids in bed fails to appreciate your skills.
SM

Lots of them never get home, that's the reality.
Fixated on something, other than driving, is a real problem with many drivers.
"Average Joe", with his partner and kids, flying on his hols, wouldn't expect that attitude from the flight crew.
"Captain Smith is going to ignore ATC, to get on the ground early, to tuck his kids up".

[chris_tivver]

WhoseGeneration said:

Really seems to annoy the majority of other drivers.
As I roll of the accelerator pedal to enter a speed limit on the limit.

One of the things that caused me to fail my first basic road test (many years ago) was me slowing down by backing off rather than using brakes. Examiners view was that by not illuminating my brake lights I was increasing danger because person behind would not know I was slowing down.

[WhoseGeneration]

chris_tivver said:

WhoseGeneration said:

Really seems to annoy the majority of other drivers.
As I roll of the accelerator pedal to enter a speed limit on the limit.

One of the things that caused me to fail my first basic road test (many years ago) was me slowing down by backing off rather than using brakes. Examiners view was that by not illuminating my brake lights I was increasing danger because person behind would not know I was slowing down.

One can't win.
It's lowest common denominater stuff yet again.
Reinforces my drive like the rest then?
"Oh, how can I tell if the vehicle in front is slowing unless I see brake lights".
Use your eyes.
"No, I just follow those in front".
We are truly lost.

[diff lock]

Drive to the system that you have been taught. If not, what was the point in undertaking the training?? But then again, you know me, I dont much care for other peoples feelings of me

[WhoseGeneration]

diff lock said:

Drive to the system that you have been taught. If not, what was the point in undertaking the training?? But then again, you know me, I dont much care for other peoples feelings of me

What's up with you then, the "Toffs" not love you enough.
Hope you did fastest time, I pity the poor horse.