Seat Leon 154mph A11

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Discussion

Ken Figenus

5,714 posts

118 months

Thursday 11th August 2016
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hora said:
Yup I wager a few consider themselves to be that undiscovered Schumacher from Hull (insert other town) too.


I feel I'm a pretty good driver but I know at silly speeds I'd be partly a passenger at my own wheel. No thanks.
This is it - some natural forces at work...

Despite some qualifications (sneeringly and negatively mentioned on here) my comfortable autobahn speed in a long wheelbase super stable car capable of more than twice the (higher than UK) French limit was, I found, about 110mph. But there is no political money/career in any subrogation or acceptance of the fact that citizens really are capable of determining a safe open road speed themselves - unless they are German of course...

We are being peddled such a load of self serving commercially driven sh... over here...

agtlaw

Original Poster:

6,721 posts

207 months

Monday 15th August 2016
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Similar thing yesterday - 160 mph A47 Thorney.

https://mobile.twitter.com/roadpoliceBCH/status/76...


surveyor_101

5,069 posts

180 months

Monday 15th August 2016
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I saw that and asked whether they had been reported for speeding and dangerous driving?

TooMany2cvs

29,008 posts

127 months

Monday 15th August 2016
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Pete317 said:
Many people who drive older cars wait for the potentially bad news from the MOT test before splashing out on new tyres.

I have on more than one occasion wasted a lot of money on new tyres for cars which subsequently failed their MOT because of something too expensive to fix.

I might drive a car with close to the limit tyres for a short while if necessary, but definitely not at very high speeds, and even more so on wet roads.
I'm really not sure the tyres are the biggest problem with that scenario.

surveyor_101

5,069 posts

180 months

Monday 15th August 2016
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TooMany2cvs said:
I'm really not sure the tyres are the biggest problem with that scenario.
What worn out tyres at 154, police should not be doing that speed on 1.7mm

anonymous-user

55 months

Tuesday 16th August 2016
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surveyor_101 said:
Red Devil said:
Why?

With a background in highways and design you will know that the dualling of the A11 between the Five Ways roundabout at Barton Mills and Thetford is quite recent (December 2014). AFAICS the only thing it lacks compared with the M11 is a hard shoulder.

To me the absence of other traffic is a much more relevant factor if you're intent on going that fast. Further more I certainly wouldn't contemplate it in March on a unlit road at night. You can only see as far ahead as your headlights will illuminate
I worked areas 1/2 nothing do with that neck of the woods.

As said 2004/2014/2016 doesn't matter it was not designed for 140mph let alone 154
What? Just what are you on about? Even when you're not posting garbage, you make your posts unintelligible with your myriad grammatical and spelling errors. Slow down and think a bit, or get back to school.

That 8 mile stretch of the A11 is wide, open with excellent clarity of the road ahead. It's one of the best surfaces around here and not at all like most of rest of the A11. Furthermore, traffic is generally light and often very light.

I'm not condoning what happened but if there's a stretch of road where 150+ might be safely achieved, that would be it.

Also, a tyre with 1.7mm of tread left is no less capable at high speed than a new tyre, unless it's raining.

surveyor_101

5,069 posts

180 months

Tuesday 16th August 2016
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REALIST123 said:
What? Just what are you on about? Even when you're not posting garbage, you make your posts unintelligible with your myriad grammatical and spelling errors. Slow down and think a bit, or get back to school.

That 8 mile stretch of the A11 is wide, open with excellent clarity of the road ahead. It's one of the best surfaces around here and not at all like most of rest of the A11. Furthermore, traffic is generally light and often very light.

I'm not condoning what happened but if there's a stretch of road where 150+ might be safely achieved, that would be it.

Also, a tyre with 1.7mm of tread left is no less capable at high speed than a new tyre, unless it's raining.
So you know the road in this case was bone dry and no rain>?

Also regardless how fresh and newer stretch of road it has not been designed for 154mph, so the principle still stands.

Do you happen to know the PSV and wearing course type? I doubt it~!!



Zombie

1,587 posts

196 months

Tuesday 16th August 2016
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surveyor_101 said:
What worn out tyres at 154, police should not be doing that speed on 1.7mm
Not sure what you're getting at with that comment but I think the tyres on Traffic cars are replaced at 3mm or 4mm?

Zombie

1,587 posts

196 months

Tuesday 16th August 2016
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REALIST123 said:
Also, a tyre with 1.7mm of tread left is no less capable at high speed than a new tyre, unless it's raining.
I don't think the tread depth it the issue, more the increased likelihood of it being damaged in someway over it's lifespan.



Zombie

1,587 posts

196 months

Tuesday 16th August 2016
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surveyor_101 said:
Do you happen to know the PSV and wearing course type? I doubt it~!!
Are you saying that you do know what the PSV and wearing couse type is for that particular stretch of road? I'd be very surprised if you did...

surveyor_101

5,069 posts

180 months

Tuesday 16th August 2016
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Zombie said:
Are you saying that you do know what the PSV and wearing couse type is for that particular stretch of road? I'd be very surprised if you did...
Dmrb volume 7 section 5

Your arguement is it's a new road built for high speed modern driving, and the weather conditions so crucial to tread argument has gone unanswered.


it will vary slightly based on the design life, to

Normally dual track will be 50-55 and motorways 60-65.

So the polished stone value on a motorway will almost always be higher than a trunk road such and so the surface is a more suitable to higher speeds.

Red Devil

13,069 posts

209 months

Tuesday 16th August 2016
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surveyor_101 said:
Zombie said:
Are you saying that you do know what the PSV and wearing couse type is for that particular stretch of road? I'd be very surprised if you did...
Dmrb volume 7 section 5

Your arguement is it's a new road built for high speed modern driving, and the weather conditions so crucial to tread argument has gone unanswered.


it will vary slightly based on the design life, to

Normally dual track will be 50-55 and motorways 60-65.

So the polished stone value on a motorway will almost always be higher than a trunk road such and so the surface is a more suitable to higher speeds.
AFAICS DMRB Volume 7 Section 5 has not been revised since 2006.*
As I'm sure you're well aware, Part 1 HD36/06 only specifies the minimum** PSV required for a given IL, traffic level and type of site.
It is also clear from the table that the driver for changes to the PSV value is the traffic level not the type of road.
Those for Site Category A1 and Site category B1 are exactly the same - http://www.standardsforhighways.co.uk/dmrb/vol7/se...

 *  If it has, can you please provide a link?
 ** In which case I don't think we are any further forward than we were previously.

Earlier you posted this.
surveyor_101 said:
More aggravating is I would only attempt that sort of speed on a motorway not the A11.
I notice that you have avoided answering my question - why?

I'll ask you again, especially in view of the fact that HD36/06 shows no difference in PSV values for motorways and d/cs with the same traffic levels.

anonymous-user

55 months

Tuesday 16th August 2016
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ooh, this thread descended into some kind of farce!

Thread summary;

- double the speed limit = pants down, but not always penetrated at court
- we do not live in Germany
- some irrelevant nonsense about coefficient of tarmac or such like
- this post

smile

bluesandtwos

357 posts

261 months

Tuesday 16th August 2016
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janesmith1950 said:
ooh, this thread descended into some kind of farce!

Thread summary;

- double the speed limit = pants down, but not always penetrated at court
- we do not live in Germany
- some irrelevant nonsense about coefficient of tarmac or such like
- this post

smile
Thanks biggrin

surveyor_101

5,069 posts

180 months

Tuesday 16th August 2016
quotequote all
Red Devil said:
I notice that you have avoided answering my question - why?

I'll ask you again, especially in view of the fact that HD36/06 shows no difference in PSV values for motorways and d/cs with the same traffic levels.
Vaguely I don't design them just cost and survey them based on a design most of the a30 to Cornwall is 50-55 and the m5 is 60-65 so don't agree. It's a guide and local HE teams will decide the final psvrequirements. They don't always refer to dmrb, it's a guide in some cases

Still various for traffic volume and design life the carriageway.

It really will depend but motorways normally have a higher life requiments.


Also when people bang on about autobahns they aren two lane they are 4'

Zombie

1,587 posts

196 months

Tuesday 16th August 2016
quotequote all
surveyor_101 said:
Your arguement is it's a new road built for high speed modern driving, and the weather conditions so crucial to tread argument has gone unanswered.


it will vary slightly based on the design life, to

Normally dual track will be 50-55 and motorways 60-65.

So the polished stone value on a motorway will almost always be higher than a trunk road such and so the surface is a more suitable to higher speeds.
My argument?

ETA...

Ah right I think I understand what you're trying to say.

Realistically, you'd have to undertake skid resistance testing to KNOW what the polished stone value is rather than assuming you know what it is.

And you still don't know what the wearing course type is. - There is a section of A11 that has been recently constructed and may well be where the person in question was caught:

http://www.highways.gov.uk/roads/road-projects/a11...

It's pretty irrelevant to the thread though.

Edited by Zombie on Tuesday 16th August 20:43

Red Devil

13,069 posts

209 months

Wednesday 17th August 2016
quotequote all
surveyor_101 said:
Red Devil said:
I notice that you have avoided answering my question - why?

I'll ask you again, especially in view of the fact that HD36/06 shows no difference in PSV values for motorways and d/cs with the same traffic levels.
Vaguely I don't design them just cost and survey them based on a design most of the a30 to Cornwall is 50-55 and the m5 is 60-65 so don't agree. It's a guide and local HE teams will decide the final psvrequirements. They don't always refer to dmrb, it's a guide in some cases

Still various for traffic volume and design life the carriageway.

It really will depend but motorways normally have a higher life requiments.
The way I read it, as the PSV values are minimums, yes they can be exceeded but not the other way round. It would be utterly pointless in having such detailed requirements if they are only a guide and the minimums could be disregarded altogether when it suits somebody. I would guess the difference in the figures you mention above is due to the A30 in Cornwall having a lower cv/lane/day design level than the M5.

However, a proper comparison in respect of the question I put to you is between the northern two lane section of the M11 and the A11 where the Seat was travelling at warp factor 9. If you wouldn't do it on the d/c A11, why would it be OK with you on the M11? Doesn't seem consistent to me.

surveyor_101 said:
Also when people bang on about autobahns they aren two lane they are 4'
confused What has four feet got to do with it? If you meant 4 lane, really? Much more likely to be 3 imo.
Yes, I know there are 4 lane sections, e.g. the A5 near Frankfurt Airport - https://goo.gl/maps/G97p3UGLvhm
But the majority of the network isn't. As for none being two lane, what's this then?



Have a look at this as well - https://www.youtube.com/watch?v=AX0ew81tXeo
I'm beginning to think that members need a salt cellar handy when reading anything you post. rolleyes

Ken Figenus

5,714 posts

118 months

Wednesday 17th August 2016
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OMG whoever produced that video needs a slap - shows some pretty out of place driving for an 'educational' video! But then its Germany so it doesn't count at all of course biggrin

heebeegeetee

28,819 posts

249 months

Wednesday 17th August 2016
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I've done a lot of miles over the years (though not recently) on 2-lane autobahns. In the 70s I found that some still had cobblestone cloverleaf junctions, fun in the wet. In the 80s in the deep south of Germany I even encountered autobahn junctions that had no slips - in effect a T-junction.

I'm still not aware of having been on a 4-lane autobahn, unless it was a multi-lane junction / xroads of major autobahn type thing.

Anyway, this film must be made up because everyone kno human beings can not breathe at this speed and thus explode. https://youtu.be/6DzsdSWTMug?t=26s

cmaguire

3,589 posts

110 months

Friday 19th August 2016
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agtlaw said:
Similar thing yesterday - 160 mph A47 Thorney.

https://mobile.twitter.com/roadpoliceBCH/status/76...
They conveniently avoid mentioning anything about the road, which I believe is the Thorney by-pass so reasonably new dual-laned with central barriers. I had this forwarded to me on holiday and my response was that 160 was fairly impressive if done on the single carriageway but nowt special on the dualled section. I expect plenty of test rides from Wheels Motorcycles get some stick down the dualled bit to see how they go. Traffic density on the dualled section is often light and visibility is good. Being the Fens, sidewinds are a factor at high speed.