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Old January 11th, 2009, 05:19 AM   #921
CborG
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It's a double fork or an incomplete turbine with an integrated half cloverleaf/half diamond exit.
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Old January 11th, 2009, 05:27 AM   #922
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Thanks.

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Old January 11th, 2009, 06:02 AM   #923
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Quote:
Originally Posted by Verso View Post

Pretty odd, isn't it? The A480 doesn't look important to me at all.
It was built when it was planned to continue the existing A48 Luxemburg - Trier - Koblenz to Wetzlar / Gießen and close the gap in the northwest of Gießen and continue to Erfurt - Leipzig / Berlin - Dresden.
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Old January 11th, 2009, 11:21 AM   #924
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this one in Germany near Wurzburg looks pretty cool, although its unfinished. With A41 on the fourth level it can be really massive
http://maps.google.com/?ie=UTF8&t=k&...4,0.05579&z=15
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Old January 11th, 2009, 12:15 PM   #925
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Yeah that one would fit in the same category as interchange Benelux near Rotterdam: when finished, a very large symmetrical stack with one of the thoroughfares at level 4.
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Old January 11th, 2009, 12:43 PM   #926
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Through lanes on the upper deck are not very common, though you'll see it from time to time. The first stack in the world (101/110 in Los Angeles) had this feature, but that was because of the geography and height differences in the direct area.
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Old January 11th, 2009, 06:48 PM   #927
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There is no stacked 4 way in Switzerland, there is only one 4-way intersection at all.
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Old January 11th, 2009, 06:57 PM   #928
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Brütiseller Kreuz?

But there's also the Limattaler Kreuz...
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Old January 11th, 2009, 07:06 PM   #929
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What's the name of this one?
http://maps.google.it/maps?hl=it&ie=...19312&t=k&z=16

And this strange four ways interchange?
http://maps.google.it/maps?hl=it&ie=...38624&t=k&z=15
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Old January 11th, 2009, 07:45 PM   #930
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Quote:
Originally Posted by ChrisZwolle View Post
Brütiseller Kreuz?

But there's also the Limattaler Kreuz...
He probably meant the latter. But I've never noticed the Brüttisellen, I thought it was a Dreieck. Another 4-way interchange in Switzerland is Hagnau east of Basel (another invisible one).
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Old January 11th, 2009, 08:33 PM   #931
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Quote:
Originally Posted by Thorin View Post
I'd call it a windmill interchange with unusually large curve radii.

Quote:
And this strange four ways interchange?
http://maps.google.it/maps?hl=it&ie=...38624&t=k&z=15
A botched cloverleaf interchange with one direct connection.
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Old January 11th, 2009, 08:46 PM   #932
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Here is a list of the different types of interchanges :
http://commons.wikimedia.org/wiki/Ca...ction_diagrams


By the way, could someone tell me what kind of interchange this is ?
http://maps.google.fr/?ie=UTF8&ll=45...10986&t=k&z=17

I would say a turbine/cloverlead hybrid, but I'll Chris or Koesj answer.
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Old January 11th, 2009, 08:50 PM   #933
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Quote:
Originally Posted by earthJoker View Post
There is no stacked 4 way in Switzerland, there is only one 4-way intersection at all.
Hey, Limmattaler Kreuz is a stack interchange: http://maps.google.com/?ie=UTF8&ll=4...09656&t=k&z=17
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Old January 11th, 2009, 09:03 PM   #934
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But you can count only 3 levels: semi-directional ramps, A3 and A4. The remaining ramps are inbetween the second and third level of the interchange.

Quote:
Originally Posted by Substructure View Post
By the way, could someone tell me what kind of interchange this is ? http://maps.google.fr/?ie=UTF8&ll=45...10986&t=k&z=17 I would say a turbine/cloverlead hybrid, but I'll Chris or Koesj answer.
I'd say it's indeed a half-turbine half-cloverleaf solution although only the turbine part (barely) grades as motorway standard because of bad geometrics.

Last edited by Koesj; January 11th, 2009 at 09:10 PM.
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Old January 11th, 2009, 10:49 PM   #935
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Quote:
Originally Posted by Koesj View Post
But you can count only 3 levels: semi-directional ramps, A3 and A4. The remaining ramps are inbetween the second and third level of the interchange.
Hmm, I see four levels. Ok, there's a little sharp curve going from east to northeast, but other than that...
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Old January 11th, 2009, 11:01 PM   #936
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Athens, Greece, stack with toll plazas. This is actually an extremely compact stack.
[IMG]http://i43.************/2a5b2x.jpg[/IMG]
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Old January 11th, 2009, 11:08 PM   #937
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I define a stack as any interchange between two crossing roadways where (assuming traffic circulates on the right) all exits are to the right and all left-turning movements are handled by semidirectional direct connectors which do not cross in plan and thus trace the outline of a Maltese cross. The turning movements can exit or merge on their own ramps (as is the case with most movements at I-10/I-405 in Santa Monica) or on shared ramps (as at US 101/Calif. 110 in downtown Los Angeles).

There are several things I would like to do in the long term:

* Produce a complete list of four-level stacks in the world (not just the US and western Europe--there are stacks in Venezuela and China, for example).

* Obtain construction dates for each stack

* Classify stacks according to turning movements handled by common and independent ramps

In the absence of specific construction dates for the vast majority of US stacks, US 101/Calif. 110 in Los Angeles has to be regarded as the first stack with common ramps (simply because it is the first stack, full stop), while I suspect I-10/I-405 in Santa Monica is probably the first with a majority of movements served by independent ramps.

Independent-ramp stacks tend to be large, sprawling, and designed for high capacity, while stacks with common ramps can be very small and offer capacities not much higher than a cloverleaf with collector-distributor lanes. The original Four Level stack is so small that three of its four levels are actually on one reinforced concrete structure and share a common National Bridge Inventory number. The signed ramp advisory speeds are 30 or 35 MPH, while a more modern design with independent ramps will usually try to support speeds of 50 MPH or better.

I am not sure there is even one European stack with independent ramps (perhaps M-40/AP-1 near Madrid?).
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Old January 11th, 2009, 11:09 PM   #938
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Quote:
Originally Posted by ChrisZwolle View Post
Athens, Greece, stack with toll plazas. This is actually an extremely compact stack.
[IMG]http://i43.************/2a5b2x.jpg[/IMG]
It's technically a stack, but does it count with those toll stations? You can't pass fast through them.
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Old January 11th, 2009, 11:11 PM   #939
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Is your location this Oxford, or the better known one?
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Old January 11th, 2009, 11:12 PM   #940
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It is a stack. The tollbooths make a conceptual mockery of it, but it is still a stack.
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