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Old July 31st, 2010, 02:24 PM   #4421
ChrisZwolle
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A few klicks south of this aquaduct is the high speed rail overpass. When they constructed this new tunnel in 2006, they immediately took advantage of the roadworks and prepared the tunnel for 2x5 lanes with shoulders.

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Old July 31st, 2010, 02:33 PM   #4422
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And as if that is not enough, a few kilometers further south, near the city of Leiden, and old obsolete 4-lane motorway bridge (drawbridge!) is replaced with a 2x3 lane aquaduct. It will be opened in 2014.

The new aquaduct will feature two roadways with 2x3 lanes, but space for 2x5 lanes + shoulders.
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Old July 31st, 2010, 07:33 PM   #4423
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Nice, but I wouldn't call that an aqueduct. An aqueduct carries water. What I think you've got is an underpass under an aqueduct. :-)
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Old July 31st, 2010, 09:35 PM   #4424
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Here's a cross section for the widening of A1 east of Amsterdam (Diemen - Muiderberg).

It will feature from left to right:

* 2 local lanes + right shoulder
* 6 through lanes + left/right shoulders
* 2 reversible lanes + left/right shoulders
* 6 through lanes + left/right shoulders
* 3 local lanes + right shoulder
* 2 bus lanes

So that is a grand total of 21 lanes plus 8 shoulders. How about that



The 14-lane aquaduct:


projected traffic volumes in 2020 by alternative.

Last edited by ChrisZwolle; July 31st, 2010 at 09:52 PM.
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Old July 31st, 2010, 10:53 PM   #4425
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Quote:
Originally Posted by ChrisZwolle View Post
Here's a cross section for the widening of A1 east of Amsterdam (Diemen - Muiderberg).

It will feature from left to right:

* 2 local lanes + right shoulder
* 6 through lanes + left/right shoulders
* 2 reversible lanes + left/right shoulders
* 6 through lanes + left/right shoulders
* 3 local lanes + right shoulder
* 2 bus lanes

So that is a grand total of 21 lanes plus 8 shoulders. How about that



Amazing! This construction mood could spread all over the country. For instance, here in Tilburg


===============

I have another question:

In Heerlen, I notice they've built a quite nice local/through freeway setup. The A76 acts like a "through" freeway, without any exit to Heerlen, save for the bifurcations with N281 (Antwerpseweg) that function as a local expressway with grade separation and junctions with local roads. Now, the actual questions rs:

- what is the speed limit on N281?

- which was built first? My guess would be that N281 was the original alignment of A76, but substandard and narrow (too many exits), so they later built the "new" A76 with only one exit as a bypass.

- do they have any active planes to build new bypasses relocating old (current) alignment as local expressways? The A28 in Amersfoort looks like a good candidate.
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Old August 1st, 2010, 12:00 AM   #4426
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Quote:
- which was built first? My guess would be that N281 was the original alignment of A76, but substandard and narrow (too many exits), so they later built the "new" A76 with only one exit as a bypass.
I guess so, if you look at the topographical maps on watwaswaar.nl you can see the N281 being (at least partially) built first. According to the two dossiers on autosnelwegen.nl they were completed one shortly after the other though. I guess this local/express setup was in the initial plans all along. Never been to Heerlen myself by the way, howzit down there?

Quote:
- do they have any active planes to build new bypasses relocating old (current) alignment as local expressways? The A28 in Amersfoort looks like a good candidate.
Not really. Bypasses were indeed considered for the A28 (and A1) near Amersfoort in the initial stages of the still ongoing Hoevelaken interchange plan, but, adding new roads which 'cut through' the landscape is a big no-no in Holland.

Spatial considerations (and the implicit assumption of huge backlash) lead to most regional or corridor initiatives accepting the status quo of the existing freeway network. There's pretty much only capacity-adding going on, and/or the completion of missing links which have been on the drawing board for decades.
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Old August 1st, 2010, 12:32 AM   #4427
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IS IT EASY TO LIVE IN A PERFECT COUNTRY LIKE THIS :S?
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Old August 1st, 2010, 12:50 AM   #4428
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Quote:
Originally Posted by Suburbanist View Post


Amazing! This construction mood could spread all over the country.
Actually, it is already happening;

Current widening projects in progress;

* A1 IC Watergraafsmeer - IC Muiderberg => widening reversible lane to 2 lanes + shoulder running
* A2 IC Holendrecht - Maarssen => widening to 2x5 lanes
* A2 Maarssen - IC Oudenrijn => widening to 2+3+3+2 lanes
* A2 IC Everdingen - IC Deil => widening to 2x4 lanes
* A2 IC Leenderheide - Valkenswaard = > widening to 3+2 lanes
* A2 Maasbracht - Geleen => widening with shoulder running
* A4 IC Badhoevedorp - IC De Nieuwe Meer => widening with shoulder running
* A4 Ringvaart Aquaduct = > widening to 2x3 lanes
* A4 Leiden => Widening to 2x3 lanes
* A5 construction Amsterdam west bypass (2x2 lanes)
* A7 upgrading N7 Sneek to 2x2 grade separated
* A9 IC Holendrecht - IC Diemen => widening with shoulder running
* A9 IC Velsen - IC Badhoevedorp => widening with shoulder running
* A10 construction 2nd Coen Tunnel (from 2x2 to 4x2 lanes)
* A10 IC De Nieuwe Meer - IC Amstel => widening with shoulder running
* A12 Woerden - Gouda => widening with shoulder running
* A15 widening A15 Maasvlakte - IC Vaanplein from 2x3 to 2+3+3+2 lanes
* A27 IC Everdingen - IC Lunetten => Widening with shoulder running
* A28 IC Hattemerbroek - IC Lankhorst => Widening to 2x3 lanes
* A50 IC Ewijk - IC Valburg => widening to 2x4 lanes
* A50 IC Valburg - IC Grijsoord => widening to 2x3 lanes

So that's a long list. However, there are many more projects slated to begin in the next few years. The projects listed below are currently within procedures, most projects will begin within 2 years from now.

* A1 IC Watergraafsmeer - IC Diemen => widening to 2x4 lanes
* A1 IC Diemen - IC Muiderberg => widening to 2x5+2 lanes
* A1 Bussum - IC Eemnes => widening with shoulder running
* A2 IC Oudenrijn - IC Everdingen => widening to 2x4 lanes
* A2 IC Vught - IC Ekkersweijer => widening to 2x3 lanes
* A2 construction new 4x2 tunnel in Maastricht
* A4 construction Delft-Zuid - IC Kethelplein
* A6 IC Muiderberg - Almere => widening to 4x2 lanes
* A9 IC Raasdorp - IC Badhoevedorp => widening to 2x3 lanes on new alignment
* A9 IC Badhoevedorp - IC Holendrecht => widening to 2x4 lanes
* A9 IC Holendrecht - IC Diemen => widening to 2x5 lanes
* A10 IC Watergraafsmeer - IC Amstel => widening to 2x4 lanes
* A12 IC Lunetten - Veenendaal => widening to 2x3 lanes using various styles
* A12 Ede - IC Grijsoord => widening to 2x3 lanes
* A12 IC Waterberg - IC Velperbroek => widening to 2x3 lanes
* A13-A16 construction new Rotterdam bypass (2x2 lanes)
* A27 IC Lunetten - IC Hooipolder => Widening to 2x3/2x4 lanes
* A28 IC Rijnsweerd - Amersfoort-Zuid => Widening to 2x3 lanes
* A28 Amersfoort-Zuid - IC Hoevelaken => widening to 4x2 lanes
* A29 IC Vaanplein - Oud Beijerland => widening to 2x4 lanes
* N31 construction Leeuwarden bypass (2x2 lanes)
* N50 construction new Ramspol Bridge (2x2 lanes)


Last edited by ChrisZwolle; August 1st, 2010 at 01:01 AM.
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Old August 1st, 2010, 07:59 AM   #4429
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Quote:
Originally Posted by ChrisZwolle View Post
Actually, it is already happening;


So that's a long list. However, there are many more projects slated to begin in the next few years. The projects listed below are currently within procedures, most projects will begin within 2 years from now.
Cool... I think Netherlands will have the highest share of freeways with more than 2X2 lanes of whole Europe.

Still, let's hope the new coalition don't aim at road projects. I friend of mine here in Tilburg told me that in the early 1980's a coalition killed almost every road project in Netherlands, and even planned to demolish some stretches of freeways like the A10 in Amsterdam and transform them into ground level boulevards.

Can you confirm that?
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Old August 1st, 2010, 10:35 AM   #4430
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Hmm, not to my recollection. I do remember there were government subsidies for obscure "think-tanks" who proposed to narrow major motorways to a boulevard with sidewalks, etc, to "make it more accessible".

Talk about wasting tax money.

It is true though, that there hasn't been much investment in roads since the early 1980's, so we have to catch up on 30 years of neglect and underinvestment. Add the extensive use of porous asphalt (which is very expensive), and you'll understand that there wasn't much money left-over for road expansion or construction. Last minister Eurlings once stated that "the Netherlands is becoming one solid traffic jam".
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Old August 1st, 2010, 11:44 AM   #4431
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Quote:
Originally Posted by ChrisZwolle View Post
Add the extensive use of porous asphalt (which is very expensive), and you'll understand that there wasn't much money left-over for road expansion or construction
Do you have any idea of to what extent porous asphalt:

- is more expensive than regular asphalt and concrete for the same m² use?

- can drain more water in case of rain compared to other pavements?
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Old August 1st, 2010, 05:25 PM   #4432
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Quote:
Originally Posted by Suburbanist View Post


Amazing! This construction mood could spread all over the country. For instance, here in Tilburg


===============

I have another question:

In Heerlen, I notice they've built a quite nice local/through freeway setup. The A76 acts like a "through" freeway, without any exit to Heerlen, save for the bifurcations with N281 (Antwerpseweg) that function as a local expressway with grade separation and junctions with local roads. Now, the actual questions rs:

- what is the speed limit on N281?

- which was built first? My guess would be that N281 was the original alignment of A76, but substandard and narrow (too many exits), so they later built the "new" A76 with only one exit as a bypass.

- do they have any active planes to build new bypasses relocating old (current) alignment as local expressways? The A28 in Amersfoort looks like a good candidate.
Does it have a chance to be the widest piece of road in Europe ?
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Old August 1st, 2010, 07:36 PM   #4433
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Let me present to you the A12 near Utrecht. This video goes from west to east, and the first part is one of the widest sections in the Netherlands, with no less than 6 lanes eastbound. After that, it's a local-express setup with 10 lanes overall.

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Old August 1st, 2010, 08:12 PM   #4434
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Old Lek Bridge Vianen

The Old Lek Bridge is a Lek River bridge near the town of Vianen, just south of Utrecht. This bridge opened to traffic in 1936 as a 4-lane bridge, and it was subsequently destroyed in war-time in 1945. After that, a pontoon existed to carry traffic across the river, and in 1948 works began to rebuild the bridge. It was completed in 1949 and the bridge reopened to traffic.

The bridge was reconstructed in 1967, adding a central barrier and bicycle paths on either side. The bridge carried traffic until 1999, when a new six-lane Lek Bridge opened immediately west of the old bridge. A third bridge was constructed in 2004 and carries modern A2. This bridge will be widened to 2x4 lanes in 2011, and there are plans to demolish the old bridge at the same time. A local action group is trying to prevent that, and keep the old bridge as a National monument.


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Old August 1st, 2010, 08:21 PM   #4435
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A general question: how is, generally speaking, the geological stability of the lowlands here in Netherlands? I know the soil in some regions is terrible to tunnel excavation like in the Randstad. But what about soil stability to accommodate pillars and other load structures?
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Old August 1st, 2010, 11:25 PM   #4436
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Complicated but, weirdly, extremely varied even in the low lands of the West. In many cases, a number of top soils will need to be removed because they're too unstable. They basically dig as far down as they need until they hit a more stable layer. Then they fill the hole with sand.

But if you go from one polder to another, the situation can vary wildly. Which means extensive research is often necessary before construction.

I should mention I'm not an expert on the situation, but this is what I gather from talking to people who know more about it than I do
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Old August 2nd, 2010, 12:56 PM   #4437
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A2 2006:


A2 2010:
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Old August 2nd, 2010, 01:37 PM   #4438
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Wow the Netherlands is going wild with these highways. Luckily the country is not big so it's easier to set up a grid line of highways all across the country. How do you finance all these widening projects? Do you have a map of U/C and proposed projects?
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Old August 2nd, 2010, 06:24 PM   #4439
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Quote:
Originally Posted by pitchka View Post
Wow the Netherlands is going wild with these highways. Luckily the country is not big so it's easier to set up a grid line of highways all across the country. How do you finance all these widening projects? Do you have a map of U/C and proposed projects?
NL is a small country with a very high population density. 400 people/km2 while e.g. Hungary has 107 and even Germany only 230. So you do not need too much motorways but you hardly find free areas for them.
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Old August 2nd, 2010, 06:53 PM   #4440
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Attus, you have to remember that population density generates traffic - the Netherlands won't need motorways that are as long as those in Hungary, but it needs a denser network, and/or wider motorways, because the motorways are busier and need either a second parallel motorway on a similar corridor and/or high capacity on the motorways. While NL doesn't need long motorways, it does need lots (which is what I guess you were getting at with too much).

You are right that it's hard to find the space for them!
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