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Victory declared on the GDE front

By johnboy 7 December 2008 28

Comrade Stanhope is celebrating massive improvements to his pathetic initial efforts to build the vexed Gungahlin Drive Extension.

    Peak-hour traffic on a popular section of the Gungahlin Drive Extension will flow more easily within weeks, with Caswell Drive southbound between the Aranda on-ramp and the City off-ramp to be duplicated by Christmas.

    Chief Minister and Minister for Transport Jon Stanhope said the 1.35km duplication would ease peak-hour pressure caused by slower-travelling merging traffic joining traffic travelling from Gungahlin.

    Scheduled for completion by the middle of next year are noise screening and visual screening for residents of Araba Street, in Aranda, and repaving of the intersection of the GDE and Belconnen Way.

Shame he didn’t build it right the first time around, but I imagine the Gungahlinoids will be thrilled by any improvement in their miserable lot.

Indeed our very own Gungahlin Al has put out a media release welcoming this breakthrough, but venturing up to the front with his bowl and asking for more please.

What’s Your opinion?


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Victory declared on the GDE front
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Xbikee 2:54 am 15 Dec 08

That new “uplifting” piece of additional-shite-road-seal on top of old Gunghalin Drivenear Mitchell makes for interesting semi-flight for Vespas and Bugs …

JC 9:10 pm 14 Dec 08

The Barton highway potholes are as a result of a botched hotmix resealing job. I recall it caused a big disturbance at the time.

Growling Ferret 7:47 am 14 Dec 08

I was impressed with the pot holes on the new bit of GDE. 3-4 metres long and up to a foot deep.

Not a great advertisement for the road construction company.

The Barton Highway potholes near Gold Creek are also something to behold.

JC 3:43 am 14 Dec 08

Gungahlin Al said :

Christ JC: what part of “putting down a waterproof bitumen skin first” didn’t you understand??

In Qld I lived on a very dangerous corner on an open road. Many accidents – especially when wet. Main Roads resurfaced the stretch using this exact approach. I meant that there was no water laying on the surface, therefore no aquaplaning. The water runs off the the sides underneath the surface. Making the need for a properly shaped water table for the impermeable layer critical of course, but eminently doable. There was also a proportion of the content that was rubber crumb if I recall correctly – for additional grip.

Didn’t ever say they put down a waterproof layer below the road, the point I was making is the road surface is not porus and the water sure the shit doesn’t drain off through the road surface.

Asphalt and bitumen both have water proofing characteristic, as well as being able to bind aggregate which is why both are used for road surfaces.

Living in Gungahlin you should be able to see daily how roads are built. The basics are as follows. Drainage in the form of ag type pipe is layed down the side of the road. On top of that drains and concrete guttering are built (sometimes the gutter is off the side of the road in the form of an open drain). A road base os put down. It is then sprayed with this water proof membraine you speak of, which is actually there to help bind the base and the surface. Next the road surface goes down. The surface is cambered such that water flows off to the sides to the gutters and hence the drains.

The problem is over time the road craks and allows water to get in, that is when the road needs to be resealed. This can be done by skimming the surface and putting down a fresh layer of asphalt or as is done in Canberra sprayed with a form of tar. The tar if left as is is too slippery hence why they then put down a bed of rocks to form the road surface.

Pot holes come about when the road surface gets water underneath which leads to the base swelling and the surface cracking. If as you say water drains out under the road then please explain what causes pot holes?

Gungahlin Al 11:30 am 09 Dec 08

Christ JC: what part of “putting down a waterproof bitumen skin first” didn’t you understand??

In Qld I lived on a very dangerous corner on an open road. Many accidents – especially when wet. Main Roads resurfaced the stretch using this exact approach. I meant that there was no water laying on the surface, therefore no aquaplaning. The water runs off the the sides underneath the surface. Making the need for a properly shaped water table for the impermeable layer critical of course, but eminently doable. There was also a proportion of the content that was rubber crumb if I recall correctly – for additional grip.

JC 5:13 pm 08 Dec 08

Gungahlin Al said :

Yes Ant, same sort of thing happened to me when I fell over on our street in Narrabundah – still got the scarred knee to show for it.

JC I beg to differ, and Roads ACT confirmed as much in a ministerial reply to me where they claimed that it was a good road surface.

The hotmix used in suburban streets and what is generally used on open roads can be quite different though. The open road variant involves putting down a waterproof bitumen skin first, then the asphalt over the top is quite porous. This allows rain to run through and off the surface, then drain away to the side underneath – really helps prevent aquaplaning.

You better go check with roads ACT again, because a porus road is what causes potholes. Ie the water gets underneath washes away the road base, which leaves a hole that then colapses. I have never heard of a road draining off underneath, I mean to say think about it, where are the drains? The whole idea of resealing the road is to SEAL it, to put down a water proof layer so that the water doesn’t go in and washes off to the drains or the verge on the side of a road, for one without gutters.

And yes spray pave and resealing are two different things. Both end up with a noisy road surface, that in some ways is good, some ways bad. Oh just to clarify the spary pave is always bloody bad.

H1NG0 3:19 pm 08 Dec 08

They don’t need to make Stanhope look bad, thats the only thing he does well.

Mr Evil 2:44 pm 08 Dec 08

imhotep said :

fozzy said :

… Gary Humphries had John Howard cut the funds available… to make Stanhope look bad.

Ah, a cunning plan indeed. And your evidence for this is?

I suppose John Howard and Gary Humphries also lit the 2003 Fires and also created the Rhodium fiasco to make Jon look bad too?

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