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Speeding Tickets Issued Against Guidelines
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M8TJT
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PostPosted: Sat May 28, 2016 7:27 pm    Post subject: Reply with quote

Watch out suss. he's behind you. Very Happy
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Kremmen
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PostPosted: Sun May 29, 2016 5:57 am    Post subject: Reply with quote

When I was preparing for my advanced driving test back in the 80's one of the first things I was told is that the object of good driving is to arrive at your destination as refreshed as when you set out.

By looking ahead, leaving plenty of braking room, staying in lane and observing speed limits is a good first start. Drivers who are continually speeding, changing lanes and looking out for the authorities tend to arrive very tired and worn out by there continual heavy attention plus they probably only gain minutes overall which is a poor trade off.
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JimmyTheHand
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PostPosted: Sun May 29, 2016 7:05 pm    Post subject: Reply with quote

sussamb wrote:
Following your logic to conclusion we should all drive as fast as possible so the journey is over as quickly as possible, do you really think that would reduce accidents or be less dangerous Rolling Eyes


No that is you trying to take a single point of mine to a logical extreme to show the fallacy and/or trying to ridicule arguments you don't like however my point is there are more factors to safety than purely how close you are to some, increasingly, often arbitrary speed limit a lot of these factors will have relationships to speed and likely to be non-linear - you need to consider them all to understand what impacts safety. Or you could just continually treat speed as the only cause of issues and the only way to increase safety at that point is reduce the speed limits and be surprised when accident rates go up.
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JimmyTheHand
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PostPosted: Sun May 29, 2016 7:13 pm    Post subject: Reply with quote

M8TJT wrote:
JimmyTheHand wrote:
The longer you are on a road the more chance there is of something random happening.
Based on that theory then, it's best to jump a red light at 100MPH because you are exposed to the danger for less time? So there seems to be something wrong with your theory as the latter example is plain wrong and stupid. Rolling Eyes


Ignoring the ridiculousness of your extrapolation, I didn't suggested speed doesn't increase risks merely there are other risks and issues that need considering
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JimmyTheHand
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PostPosted: Sun May 29, 2016 7:21 pm    Post subject: Reply with quote

NukeThemAll wrote:
Assuming a car has a constant deceleration,


A big assumption I think
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JimmyTheHand
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PostPosted: Sun May 29, 2016 7:30 pm    Post subject: Reply with quote

M8TJT wrote:
Watch out suss. he's behind you. Very Happy


probably the one leaving plenty of space

Kremmen wrote:
When I was preparing for my advanced driving test back in the 80's one of the first things I was told is that the object of good driving is to arrive at your destination as refreshed as when you set out.

By looking ahead, leaving plenty of braking room, staying in lane and observing speed limits is a good first start. Drivers who are continually speeding, changing lanes and looking out for the authorities tend to arrive very tired and worn out by there continual heavy attention plus they probably only gain minutes overall which is a poor trade off.


The biggest thing we could do to increase safety is leave an average of an extra second space between vehicles - but the amount of traffic and the impatience of drivers won't allow it.
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sussamb
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PostPosted: Sun May 29, 2016 7:47 pm    Post subject: Reply with quote

JimmyTheHand wrote:


The biggest thing we could do to increase safety is leave an average of an extra second space between vehicles - but the amount of traffic and the impatience of drivers won't allow it.


Really? I do it all the time. Never a problem and 'leaving space around you' was one of the things hammered home when I was on my blue light driving course Wink
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DennisN
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PostPosted: Sun May 29, 2016 7:52 pm    Post subject: Reply with quote

I'm not very good at sums and extrapollution of arguments.

Does anybody mind if I just drive within the posted speed limit, not up to it?
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Oldboy
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PostPosted: Sun May 29, 2016 9:00 pm    Post subject: Reply with quote

DennisN wrote:
Does anybody mind if I just drive within the posted speed limit, not up to it?
+1
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JimmyTheHand
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PostPosted: Sun May 29, 2016 9:53 pm    Post subject: Reply with quote

sussamb wrote:
JimmyTheHand wrote:


The biggest thing we could do to increase safety is leave an average of an extra second space between vehicles - but the amount of traffic and the impatience of drivers won't allow it.


Really? I do it all the time. Never a problem and 'leaving space around you' was one of the things hammered home when I was on my blue light driving course Wink


The issue is not that individuals can leave gaps, but what it would do to road carrying capacity if most chose to drive safely (judging by what I see during commute I doubt most know what that is) - I suspect the maximum number of vehicles per hour means unsafe distances
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PostPosted: Mon May 30, 2016 1:20 pm    Post subject: Reply with quote

JimmyTheHand wrote:
The issue is not that individuals can leave gaps, but what it would do to road carrying capacity if most chose to drive safely (judging by what I see during commute I doubt most know what that is) - I suspect the maximum number of vehicles per hour means unsafe distances

But then it only takes one to drive unsafely and with too small a gap to create a collision that at best would really reduce the hourly road carrying capacity (road partially or even fully blocked) and at worse one or more serious injuries or even deaths.

It's better to be five minutes late in this world than five years early in the next, although leave ten minutes early and you won't be late! Thumbs Up
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DennisN
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PostPosted: Mon May 30, 2016 3:54 pm    Post subject: Reply with quote

Aha. Does that mean if I drive within the speed limit I've still got another five years?
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Duddy
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PostPosted: Wed Jun 01, 2016 12:15 am    Post subject: Speeding tickets issued against guidlines Reply with quote

Just picked up this tread. Without going into the ins and outs of exceeding the speed limit a question was asked what the stopping distance difference was between 30 and 33 mph.
It is of course variable dependant on road condition but using the figures from the highway code (Not admissable in law) i.e. deceleration rate of 0.68g the stopping distance from 30 mph would be 13.47m (44ft 2.5 inch) and from 33 mph 16.31m (53ft 6inch). Difference 2.84m further.
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Kremmen
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PostPosted: Wed Jun 01, 2016 4:39 am    Post subject: Reply with quote

Has the highway code stopping distances been revised at all?

When those figures were originally calculated we still had drum brakes and pre-stretched cables.

On the other hand though thinking distance has probably increased with all the in car gadgets taking your concentration off the road now.

Only last week we followed a car who was veering and speed varying. When I managed to get past, my passenger said he was looking down into his lap, presumably texting.
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M8TJT
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PostPosted: Wed Jun 01, 2016 8:54 am    Post subject: Re: Speeding tickets issued against guidlines Reply with quote

Duddy wrote:
the stopping distance from 30 mph would be 13.47m (44ft 2.5 inch) and from 33 mph 16.31m (53ft 6inch). Difference 2.84m further.
That's a bit over 9 feet extra. So a 10% increase in speed results in stopping distance increasing by 21%
And as a matter of interest, if you apply the 10%+2 to 30 =35, the stopping distance is now 60.22 ft. that's an increase of 36% over 30MPH.
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