Why after all these years with armco, is it not good enough ?

[thepharcyde]

Sadly,in some situations, concrete walls don't stop 40+ tonners much better.....

Still, if it goes any way to prevent this, its no bad thing.
]

Suspension failure......

Bloody hell. That's terrible.

 

[SoliD]

Getting a lot of this down on the M27 now, but they are putting it in when they are doing new bits of motorway such as climbing lanes and changing the lighting, much better than armco, being a lot more resilient and anything to stop major traffic jams is a good thing in the long run. Also means more lanes cane be installed which is needed for our overcrowded road network.

 

[Dolph]

There is also a progress reason. Armco was previously used because it provided for deformation and therefore driver protection when the car did not. Modern cars provide much better impact protection by design and therefore the protection of a deforming barrier is much less important.

 

[Fr0dders]

Any type of barrier is not designed to take a head on collision its designed for glancing blows at about 20 degrees. The new concrete barrier schould have a minimal deflection if hit.

Also it is costing millions to do this scheme as the traffic management alone would easily be a couple of million. Construction schemes are really expensive. The works along the M1 are part of the active traffic management systems being implemented (be prepared for more) as this country can't afford and local residents don't want new motorways designed to cope with the flows ours experience. They simply cannot cope withthe current flows of traffic which is ever increasing.

Btw if you are feeling really geeky go to this link here as this is TD19 which is the standard for road restraint systems.

My job is boring

Aero

is the same active traffic management planned for the M62 as well

thats equally as busy, if not more so than the M1

 

[.:MBK:.]

newer stretches of the A1, certainly north of wetherby also have the large concrete, and i was wondering what was going on the m62 (around leeds atleast, know theres some other work further east of the M1), going to be a mare to get through when those avg speed cameras go live

 

[Hawk Tuah]

It gives people a job. Spending a fortune digging up roads, and further delving this country into catastrophic debt is much more important than higher unemployment figures.

 

[Mad old tory]

This is peanuts compared to the national debt and has an actual end product of use rather than some of the other wastage we see. Not entirely sure whether it will lower unemployment but at least if it does it will get those people off benefits, paying taxes and spending money again.

 

[breadturbo]

http://video.google.com/videoplay?docid=-8591879745880686794#

concrete wins

 

[Duke]

It gives people a job. Spending a fortune digging up roads, and further delving this country into catastrophic debt is much more important than higher unemployment figures.

Or it could be to do with safety, improving the road network, surface, signs, etc..

 

[Scania]

http://video.google.com/videoplay?docid=-8591879745880686794#

concrete wins

As I alluded to earlier, not all the time.

I've seen a 17ton HGV smash through a concrete barrier on the M2, it was like it (the barrier) was made of paper.

 

[SoliD]

As I alluded to earlier, not all the time.

I've seen a 17ton HGV smash through a concrete barrier on the M2, it was like it (the barrier) was made of paper.

Not exactly the same stuff i you read the blurb that is the concrete barriers they use on military bases.

 

[Scania]

Not exactly the same stuff i you read the blurb that is the concrete barriers they use on military bases.

Fair enough - CBA to read ......

 

[Werewolf]

The section of M1 between J28 and J25 is laughable.

15 miles of narrow lanes and a 50mph limit, and at any given time you'll see about half a dozen blokes actually doing some work on it on a 200-yard stretch.

Restrict a mile or two at a time, finish it and move onto the next bit.

But that's far too much like a dose of common sense, so lets knacker up 15 miles of motorway just to work on 1/50th of it at a time

IIRC the necessary legal requirements for a change of speed limit would probably make that very hard to do, as it requires a set start/stop date for the change to be decided in advance.
So if they do it a mile at a time on a 15 mile stretch they need 15 orders and have to work very exactly to the time table, with very little leeway for delays in the work, by doing it for a longer stretch they have a lot less paperwork (cheaper/less chance of a mistake, faster to get through), and they can allow for delays averaged over the entire project rather than having to allow it for every single stretch (it also means if there is a delay at one stage they can potentially do a bit further down that may not be affected by the whatever is causing the delay*).
I think there is also some research that suggests it's safer to have a certain minimum stretch for any change in speed limits when above a certain speed.

There is generally a reason they do what they do...




*say a delivery of materials is late it can be worked around (weather on the other hand probably can't).

 

[andyp]

IIRC the necessary legal requirements for a change of speed limit would probably make that very hard to do, as it requires a set start/stop date for the change to be decided in advance.
So if they do it a mile at a time on a 15 mile stretch they need 15 orders and have to work very exactly to the time table, with very little leeway for delays in the work, by doing it for a longer stretch they have a lot less paperwork (cheaper/less chance of a mistake, faster to get through), and they can allow for delays averaged over the entire project rather than having to allow it for every single stretch (it also means if there is a delay at one stage they can potentially do a bit further down that may not be affected by the whatever is causing the delay*).
I think there is also some research that suggests it's safer to have a certain minimum stretch for any change in speed limits when above a certain speed.

There is generally a reason they do what they do...




*say a delivery of materials is late it can be worked around (weather on the other hand probably can't).

Maybe so.

Still doesn't change the fact that since such horrendous bureaucracy lacks that much common sense and consideration for practicality, I still find it a laughable and quite pathetic state of affairs.

And the SPECS are set nowhere near 50mph either.