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Old September 25th, 2012, 11:21 PM   #8201
keokiracer
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Quote:
Originally Posted by ChrisZwolle View Post
(called 2x7 but it's 2+5+5+2).


But what was the deal between Bilthoven and interchange Rijnsweerd. How wide is that going to become?
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Old September 25th, 2012, 11:30 PM   #8202
ChrisZwolle
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2x4 lanes.

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Old September 26th, 2012, 12:42 AM   #8203
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That's a bunch more lanes than when I lived in Utrecht ten years ago. Pretty impressive. How many lanes on the A28, BTW?

On a very different note: I remember impressing my mother and her husband when I - only by looking at the map beforehand - took us straight back into Utrecht from the southeast after a 500+ km trip around the Netherlands...

Last edited by PLH; September 26th, 2012 at 03:50 PM.
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Old September 26th, 2012, 01:19 AM   #8204
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Will the new area between Lunetten and Rijnsweerd northbound also feature grade separation? Right now it is a weave area, but with high traffic flow and three lanes coming from the A12 and three from the A27, it is often a big mess (partly because people want to change lanes at the very beginning of the intersection, partly because lorries coming from the A12 have to move 4 lanes to get on the A27).

The A28 from Utrecht to Amersfoort will feature 2x3 lanes, highly needed. Apart from the A2 between Utrecht and Amsterdam (because of low enforced speed limits), I think it is the most annoying piece of motorway in the Netherlands, construction started years too late on that stretch, but it will be better in the near future luckily.
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Old September 26th, 2012, 09:04 AM   #8205
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Here are some pics that might help. All traffic will be sorted per direction at both interchanges, no more weaving.

interchange Lunetten:


Interchange Rijnsweerd:


Quote:
Originally Posted by ElviS77 View Post
How many lanes on the A28, BTW?
2x3
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Old September 26th, 2012, 01:07 PM   #8206
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So effectively Interchanges Rijnsweerd and Lunetten are becoming one interchange?

From A28 going west, you decide at interchange Rijnsweerd whether to take the A27 South or the A12 West.

From the A27 going north you already decide at Lunetten whether to take the A27 north or the A28 east.

Coming from the A28:
- right lanes: To A27 north (Almere) and A28 west (Utrecht-centrum)
- middle lanes: To A27 south (Breda) and A12 east (Arnhem)
- left lanes: To A12 west (The Hague/Rotterdam)
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Old September 26th, 2012, 01:27 PM   #8207
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That's right. It's like the two Ridderkerk interchanges (which is even wider at 16 lanes in between).
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Old September 26th, 2012, 01:42 PM   #8208
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This is the current layout of the A27.

image hosted on flickr

A27 Amelisweerd 30-06-2012-7 by Chriszwolle, on Flickr

This concrete depression will be widened by 15 meters on either side. Some suggested to widen it to six lanes each way (2+4+4+2) to spare the Amelisweerd natural area. However, design standards have a minimum length between a merge and a lane reduction, which means that this area would need to be widened by 15 meters. Widening it to 12 instead of 14 lanes only saves 0,16 hectare of right-of-way. Additionally 14 lanes performs much better from a traffic engineering point of view because the adjoining sections also merge to and from 14 lanes in total, which means 12 lanes is basically a future bottleneck. Therefor, a widening to 14 lanes makes most sense.

It's astounding if you consider the A27 only exists since 1986. It was built with 2x4 lanes, and widened to 4+6 lanes in 2012 as a temporary solution. The A27 cuts through the Amelisweerd estate with a natural area on the east side of Utrecht. There were a lot of ecologists and environmentalists protesting against construction, the riot police had to clear out the woods before they could cut down the trees.

So widening the right-of-way by 15 meters on either side will induce new opposition. However, the widening will also consist of a very large ecoduct (250 meters) on top of the motorway. The 15 meters of forest to be cut is a small sacrifice for a much better end result. But I'm afraid some people will not look further than cutting the trees.

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Old September 26th, 2012, 07:08 PM   #8209
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Thanks for the answers!
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Old September 27th, 2012, 07:24 PM   #8210
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A4 Leiden

Two aerial photos of the A4 widening at Leiden. The A4 will be widened to 2x3 lanes with space for 2x5 lanes. Six lanes are currently already in use in one aquaduct, the second will be constructed until 2014.



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Old September 27th, 2012, 08:20 PM   #8211
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Was that a mistake, only it looks like it's 2x3 already?
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Old September 27th, 2012, 08:54 PM   #8212
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It is, but the roadworks aren't completed yet. They lead the 2x3 highway through 1 part of the aqueduct, so they have plenty of room to build the other part of the aqueduct. After the 2nd part of the aqueduct is built, the road will probably be closed for a weekend to change some markings and then the road will open with 3 lanes per part of the aqueduct. The lanes you see are narrower than usual. Only to fit 2x3 into 1 tube safely.
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Old September 27th, 2012, 08:58 PM   #8213
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Yes, it's temporary already 2x3 lanes, but with no shoulders and narrow lanes.

This location originally featured a drawbridge with 2x2 lanes and no shoulders. It was the worst bottleneck in the Netherlands. The widening of A4 began in 2010 by constructing the first aquaduct under the Oude Rijn River (barely visible in the distance). These new aquaducts (two of them) have space for 2x5 lanes. They have completed one aquaduct so far, already with a temporary six-lane setup.

The second aquaduct will be completed in 2014. After that traffic flows with 2x3 lanes in two parallel aquaducts. This means the A4 can later be expanded to 2x5 lanes without having to do any construction here.

The whole A4-corridor will likely feature at least 2x5 lanes in the future. A portion of A4 is currently being widened to 14 lanes (2+5+5+2) at Hoofddorp, which could also be extended south to the Burgerveen Interchange (A4/A44).

This photo is about 5 kilometers north of the photos in the posts above. The high-speed rail crosses the A4 motorway. As you can see, there is also space for 2x5 lanes.
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Old September 27th, 2012, 09:03 PM   #8214
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Ah I see, thanks!
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Old September 27th, 2012, 09:31 PM   #8215
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A2

near Maarssenbroek (northern suburb of Utrecht)





Disappearance of the last remains of the old A2 next to the tunnel at Leidsche Rijn (as of today September 27, 2012)
Perhaps it is THIS this passage refers to and NOT Catharijnesingel!
Empezado por Suburbanist
I read in a blog (whose author blocked commenting me) a long misinformed post about Netherlands transportation.

They used some other picture of A2 removal to say how the great city of Utrecht, having adopted traffic calming and narrowed many roads downtown in the late 1970s and 1980s, is now even removing an entire freeway altogether to expand some sustainable neighborhood.

Little did the American fanboi knew about how much roadwork has been going on around UTrecht :p



Last edited by domtoren; September 27th, 2012 at 09:41 PM.
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Old September 27th, 2012, 09:35 PM   #8216
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Nice photos. That is 60-year old concrete from the original 2x2 A2, constructed in 1952-1953.
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Old September 27th, 2012, 10:58 PM   #8217
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It is interesting that widening from 2+2 already considers widening to 5+5. This is pretty steep thing, is traffic growth really that high to justify extra cost?
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Old September 27th, 2012, 11:13 PM   #8218
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The widening is at least 30 years overdue. The 2x2 section carried 108.000 vehicles per day and can easily grow to 160.000 vehicles within the next 10 years due to rerouting of traffic and a large-scale new development west of Leiden.

This particular project was battled by environmentalists which delayed it several times, leading to public outcry, even from people living in the area next to the motorway. So when they widened it, they thought "we better do it right at once", but more than 2x3 was politically not feasible at the time. The rest of A4 already has a right-of-way for 10 lanes in most places, so they can easily widen it at low cost and little to no impact on the surrounding area.
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Old September 29th, 2012, 12:37 AM   #8219
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Impressive motorway widening in a country that does not seem to stop improving its roads at the moment. In comparison, in the UK we are going to see a couple of motorways widened soon by literally converting the shoulder into a permanent traffic lane and having no shoulders at all.

Has there been any debate about motorway lighting in the Netherlands? The Netherlands does have a lot of motorway lighting, including in relatively rural areas with straight sections and few junctions, although it is lower power than in the UK. Is the policy firmly to continue lighting up motorways, or are midnight-0500 or permanent switch offs planned?
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Old September 29th, 2012, 12:55 AM   #8220
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Rijkswaterstaat is putting up LEDs. The energy savings are such (around 50%) that the amount of lights placed around the country are not currently subject to debate (as far as I know). According to this source, the country has about 1000km of lit motorway.
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