Wellington SH1/SH2 road works

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#1215245 15-Jan-2015 07:59

timmmay: Today the south bound lanes are back to normal. The weirdness of the past couple of days appears to have been them moving the lanes slightly.

Refer to the second post in this thread

rscole86

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#1215276 15-Jan-2015 09:13

timmmay: Today the south bound lanes are back to normal. The weirdness of the past couple of days appears to have been them moving the lanes slightly.

The crew is well established at the site compound under the SH1 northbound flyover at the Hutt Road/Jarden Mile intersection. They’re on track producing 110 temporary concrete barriers to be deployed on the motorway in January.

On 5 January, the 15 month effort to replace the median barrier will begin. Crews will move onto the motorway, starting at the northern end of the project (Ngauranga), and working in 300-400m sections, replace the existing central median safety barrier.

The speed limit on the motorway will be lowered while this work is happening.

January 2015 to March 2016

done in sections
temporary barriers both sides of existing barrier to allow work to happen safely
traffic moved over; three slightly narrower lanes retained
speed lowered on the section of motorway that is being worked on.

nzkiwiman

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#1215408 15-Jan-2015 11:47

Geektastic: Squirting a bit of tar on top, shovelling chippings on that and letting the public sweep them off with their paintwork and car windscreens is not how you build a proper road!

They did that last night around home
*sigh*

tieke

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#1215419 15-Jan-2015 12:09

Not that we have any say in it, but fifteen months does seem a long time to replace a median barrier. At around 3km, that's only 200m of barrier a month.

D1023319

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#1215460 15-Jan-2015 12:56

sbiddle: What roadworks in particular?

If you're meaning the changes on SH1 between Aotea Quay and Ngauaranga Gorge you'll obviously missed the huge amounts of advertising they've been doing for this. They're widening the motorway and making the lanes narrower to make 4 lanes all the way. This started last week and full details are on the NZTA site http://www.nzta.govt.nz/projects/ngauranga-to-aotea-quay/index.html

I just hope it doesn't make things worse like their changes to the SH1/SH2 Northbound merge did - this made traffic flow to Petone worse, not better.

I just dont see the point of the four lanes.
Its like fixing a blocked hose by making it wider to accommodate more water and give it more time to leak out the end.

They would better reduce congestion by:
- 4 laning the hutt road all the way to petone,
- removing the blockage at the city end of the motorway i.e. extend two way to airport / hospital
- build the link road from petone to grenada.

floydbloke

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#1215490 15-Jan-2015 13:27

D1023319:
I just dont see the point of the four lanes.

I guess it will mean less congestion for those (including myself) going up the gorge.

Did Eric Clapton really think she looked wonderful...or was it after the 15th outfit she tried on and he just wanted to get to the party and get a drink?

Geektastic

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#1215545 15-Jan-2015 16:04

tieke: Not that we have any say in it, but fifteen months does seem a long time to replace a median barrier. At around 3km, that's only 200m of barrier a month.

Yes - and it should be at least that per WEEK!

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Jase2985

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#1215580 15-Jan-2015 17:08

building a full solid concrete median barrier is not an easy task, let alone something that could be done in a week.

Maybe 2 weeks per couple of hundred meters but definatly not a week, the concrete has to set remember

MikeB4

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#1215581 15-Jan-2015 17:10

Jase2985: building a full solid concrete median barrier is not an easy task, let alone something that could be done in a week.

Maybe 2 weeks per couple of hundred meters but definatly not a week, the concrete has to set remember

Also given that its being installed on a major arterial route into the Capital the work has to be done at times to cause the least disruption

Geektastic

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#1215595 15-Jan-2015 18:01

Jase2985: building a full solid concrete median barrier is not an easy task, let alone something that could be done in a week.

Maybe 2 weeks per couple of hundred meters but definatly not a week, the concrete has to set remember

Why use concrete though?

It's a slow process and the normal armco-style barriers used in the US and EU can be installed much faster. They are proven having been in use since the 60's, are likely to be more energy-absorbent in a crash than solid concrete and are probably cheaper.

MikeB4

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#1215601 15-Jan-2015 18:23

Geektastic:
Jase2985: building a full solid concrete median barrier is not an easy task, let alone something that could be done in a week.

Maybe 2 weeks per couple of hundred meters but definatly not a week, the concrete has to set remember

Why use concrete though?

It's a slow process and the normal armco-style barriers used in the US and EU can be installed much faster. They are proven having been in use since the 60's, are likely to be more energy-absorbent in a crash than solid concrete and are probably cheaper.

That is something I don't get either

Jase2985

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#1215609 15-Jan-2015 19:04

Geektastic:
Jase2985: building a full solid concrete median barrier is not an easy task, let alone something that could be done in a week.

Maybe 2 weeks per couple of hundred meters but definatly not a week, the concrete has to set remember

Why use concrete though?

It's a slow process and the normal armco-style barriers used in the US and EU can be installed much faster. They are proven having been in use since the 60's, are likely to be more energy-absorbent in a crash than solid concrete and are probably cheaper.

Still have to install concrete footings for them

But im not an engineer, i dont make decisions on how/why things are used.

There is probably a good reason behind it though.

The US and EU tend to have much more seperation between different directions on the motorway than we do so maybe that has is factor?

blakamin

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#1215631 15-Jan-2015 19:50

Armco isn't going to stop a truck and it's dangerous (unless fully enclosed) for motorcyclists. Concrete barriers along the motorway are higher than Armco (Armco only really works with short posts). Concrete barriers can be moved in the event of a serious civil emergency with a crane and replaced easily (you'd have to cut all the posts to do that to Armco). Armco will bend and end up in the oncoming lane, concrete stays where it is 98% of the time (did anyone see that viper that crossed SH1 Armco between Plimmerton and Pukerua Bay years ago? What a mess. I've seen many vehicles hit the concrete but can't recall one going through).

MikeB4

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#1215632 15-Jan-2015 19:55

blakamin: Armco isn't going to stop a truck and it's dangerous (unless fully enclosed) for motorcyclists. Concrete barriers along the motorway are higher than Armco (Armco only really works with short posts). Concrete barriers can be moved in the event of a serious civil emergency with a crane and replaced easily (you'd have to cut all the posts to do that to Armco). Armco will bend and end up in the oncoming lane, concrete stays where it is 98% of the time (did anyone see that viper that crossed SH1 Armco between Plimmerton and Pukerua Bay years ago? What a mess. I've seen many vehicles hit the concrete but can't recall one going through).

A big chunk of the urban motorway is already enclosed Armco so I am not sure why they are using concrete. I am pleased they are not going to use that biker lethal wire barriers.

blakamin

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#1215641 15-Jan-2015 20:08

KiwiNZ: A big chunk of the urban motorway is already enclosed Armco so I am not sure why they are using concrete. I am pleased they are not going to use that biker lethal wire barriers.

Normally only where the road is a bit wider and has a central median or just on the outside.

I'm just going by what I was told when I was driving a tipper for road-building in the Welly region about 8-9 years ago.

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