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PostPosted: Sat May 11, 2013 10:55 
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jomukuk wrote:
The speed is 40 on s/c roads because of the lengthy stopping distance of trucks.
140 feet at 40 mph, but over 300 feet at 60 mph.
Compare those to a car..60 and 130 feet.
Not only that, but if a truck hits a car it is a body-bag job, if there are passengers, multiple body-bags.
One drove into a jcb just up the road the other day....another body-bag job (hey, if the driver couldn't spot a bright yellow digger....)


Do you have a link to some research backing those figures up jom? I'd be perfectly happy to believe that a truck can't stop as fast as a car, but those figures seem rather excessive to me. Clearly the people who write the Highway Code don't seem to be aware of it! :wink:

The other thing that people seem to be forgetting is that coaches don't weigh 40 tons like artics can.


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PostPosted: Sat May 11, 2013 11:09 
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weepej wrote:
Well, it certainly read to me as "if coaches full of people can legally travel at 70 I think the Argos truck should be allowed to as well". If you reread I think you'd agree right?
:nono:

Because you know me, or think you know me, you have not looked at what I said impartially. You re-read it; without bias this time.

I am still open to any argument for the pros and cons of coaches travelling at high speed or indeed HGVs. As already said, starting with making seatbelts mandatory would be a good start. One drawback I can see with allowing HGVs to go faster is you have one, (possibly tired), man without some passengers to oversee everything. Will you allow me to see how the debate goes before I make my mind up.. Image

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PostPosted: Sat May 11, 2013 23:18 
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I could refer admin to other posts by Weepy claiming near adhominin when he was challenged over answering questions and his subsequent submerging out of sight, but I'll not. But Yet again ,he's used the same tactic against other posters, without refuting their arguemants . Or is it that he's frightened that if speed limits are raised, he'd have problems ,on his cycle.

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PostPosted: Sun May 12, 2013 08:24 
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Mole wrote:
jomukuk wrote:
The speed is 40 on s/c roads because of the lengthy stopping distance of trucks.
140 feet at 40 mph, but over 300 feet at 60 mph.
Compare those to a car..60 and 130 feet.
Not only that, but if a truck hits a car it is a body-bag job, if there are passengers, multiple body-bags.
One drove into a jcb just up the road the other day....another body-bag job (hey, if the driver couldn't spot a bright yellow digger....)


Do you have a link to some research backing those figures up jom? I'd be perfectly happy to believe that a truck can't stop as fast as a car, but those figures seem rather excessive to me. Clearly the people who write the Highway Code don't seem to be aware of it! :wink:

The other thing that people seem to be forgetting is that coaches don't weigh 40 tons like artics can.



This is pretty impressive. Not sure how it would handle with a load that could jack knife though, and this does seem "low" speed so I presume the system only works at the lower speed trucks are limited to.

http://www.youtube.com/watch?v=ridS396W2BY


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PostPosted: Sun May 12, 2013 08:44 
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Hugely impressive! I knew that various truck and bus companies are working on this sort of thing, but that's the first time I've seen it in action. The write-up says that the truck was fully-laden at the time too - 40 tonnes, which makes it all the more impressive. That WAS a "load that could jack-knife" though. Any articulated load can do that. It is becoming much less common now, as older trucks without ABS are taken off the road. ABS has been a requirement on HGV trailers for some years now, and this system is an add-on. It's the ABS that sorts out the jack-knife problem. The write-up on the Volvo website says that it works at up to 70 km/h. I don't know why they've chosen that as a cut-off though. All new HGVs will have to be fitted with Advanced Emergency Braking Systems by the end of 2015. I think the "clever bit" is the various degrees of warning it gives the driver before it actually takes over.

I'd like to see how it acts in the middle of a bend though - that would be a tougher test!


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PostPosted: Wed May 15, 2013 15:09 
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I'd like to see how it acts in the middle of a bend though - that would be a tougher test!


No you wouldn't! :scratchchin:


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PostPosted: Wed May 15, 2013 17:50 
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These days, the ABS should sort it out. It's unlikely to jack knife, but won't stop as well as in a straight line.


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