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#282694 6-Mar-2021 15:04
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Wellington specific, but: what's with the completely idiotic decision by NZTA not to build a slip road at what will be the new Transmission Gully/SH1 interchange because apparently they couldn't find a contractor to build it!!! What sort of excuse is that? Do we never build infrastructure properly in this country? Instead they are saying "they are looking at other options to ensure safety at the merge point, including variable message signs and CCTV cameras".


This is the Wellington "Smart Motorway" debacle all over again and some years before that, the SH2 River Road bypass being build as as two lane road that then had to have passing lanes tacked onto it immediately afterwards.


This is going to be a shambles.


 


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Benoire
2798 posts

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  #2670077 8-Mar-2021 13:33
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Obraik:

 

dfnt: Yep, I don’t understand the logic behind using chip seal when they constantly have to repair it vs asphalt

Then it constantly looks like it’s in a state of disrepair which is why it’s hard to determine if it was laid weeks or years ago

 

From what I understood, they usually lay chip seal first as a base, leave it for a few months to bed in and then apply asphalt on top. 

 

 

Not necessarily.  Chipseal is on average 4 times cheaper than ashpalt with 1/2 the design life.  As long as the road pavement underneath is sound and putting 0 shear on the formation (foundations of the road) from the axle loads then generally chipseal is a more cost effective surface; it is however rubbish for user quality but that doesn't in some ways count when budgets are lean and the ratepayer doesn't want to increase rates to spend more upfront capital.


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