Spaghetti Junctions: Extensive Highway Interchanges

[MolsonExport]

Spaghetti Junctions: Extensive Highway Interchanges

I am surprised there is no forum yet on this topic (I couldn't find one).

Here is one that I recently visited in Shanghai, Puxi side (not my photos):

wikimedia commons; inautonews.com

This scary bastard (Tom Moreland Interchange) in Atlanta:

roclar.net

On google maps: http://maps.google.com/maps?ie=UTF8&...,0.009978&z=17

The High-Five of Dallas:

wikimedia commons

The Judge Harry Pregerson Monster of Los Angeles:

desktopwallpapers.ru

The Basketweave, on the 401, Toronto:

wikimedia commons

[MolsonExport]

The turcot interchange in Montreal (under reconstruction):

c/o Richard at the Eco-Senior

[glowrock]

The one you showed in L.A.'s definitely one of the worst, MolsonExport. There are numerous ones in the L.A. area that are insanely complicated. Some of the ones in Houston and Dallas are crazy as well. And that stretch of the 401, well, I'll get to experience that one this coming weekend, especially since that photo is only a few kilometers from my aunt's place!

Aaron (Glowrock)

[pesto]

Originally Posted by glowrock

The one you showed in L.A.'s definitely one of the worst, MolsonExport. There are numerous ones in the L.A. area that are insanely complicated. Some of the ones in Houston and Dallas are crazy as well. And that stretch of the 401, well, I'll get to experience that one this coming weekend, especially since that photo is only a few kilometers from my aunt's place!

Aaron (Glowrock)

The Pragerson (better known as the 110/105) is complicated for a number of reasons: of course, it has huge amounts of traffic, but it also has multiple levels of regulated and priority lanes and a transit station and related facilities and parking.

Quite a view from the air.

[pesto]

Originally Posted by MolsonExport

The turcot interchange in Montreal (under reconstruction):

c/o Richard at the Eco-Senior

Great picture. Probably former Soviet design.

btw, are you an information theory buff? Your quote from Rumsfeld is a layman's summary of one of the tenets leading to the conclusion that it is impossible to create algorithms to fully analyze axiomatic models. Comes up in strategic defense planning. I assume Rumsfeld picked it up either at Princeton or at his several tech CEO positions.

[Cirrus]

Biggest in the DC area is the Springfield Interchange, which includes both of these. It's 24 lanes in the space between them. The construction you see is the addition of HOT lanes to the Beltway, which will add even more ramps to the left one.

[glowrock]

Originally Posted by pesto

The Pragerson (better known as the 110/105) is complicated for a number of reasons: of course, it has huge amounts of traffic, but it also has multiple levels of regulated and priority lanes and a transit station and related facilities and parking.

Quite a view from the air.

I'm aware of that, pesto. I've driven the 110/105 interchange a number of times. Not too many 5+ level interchanges around, Dallas's High Five notwithstanding...

Aaron (Glowrock)

[Steely Dan]

chicago's largest is the circle interchange where the dan ryan/kennedy intersects with the ike, just southwest of downtown, but it's an outmoded design from the 60s that has notorious back-ups. i've heard that it's the worst interchange in the nation in terms of back-ups.


source: http://upload.wikimedia.org/wikipedi...ge_Chicago.jpg







milwaukee has a 5 level interchange, the recently re-opened marquette interchange, just south west of downtown.


source: http://www.hntb.com/sites/default/fi...I_2009_072.jpg

[brickell]

Miami has the Golden Glades. The intersection of I-95, Palmetto Expressway, US441 (surface) and SR9 (surface), It's not that impressive looking but it is hell to navigate. It's the only interchange I've seen where you have to exit onto surface roads, including a stop light, to get from one highway to another.'

But it also has a great view of Miami's skylines from atope the HOV lane which flys over the whole thing.

[MolsonExport]

Originally Posted by pesto

Great picture. Probably former Soviet design.

btw, are you an information theory buff? Your quote from Rumsfeld is a layman's summary of one of the tenets leading to the conclusion that it is impossible to create algorithms to fully analyze axiomatic models. Comes up in strategic defense planning. I assume Rumsfeld picked it up either at Princeton or at his several tech CEO positions.

not per se, but I am a prof (marketing) and I teach research methods, thus I dabble in theory. I've always liked Rummy's quote on multiple levels.

[Xing]

East St Louis is building a new one for the new bridge, with this one just a few miles away.

[tdawg]

I'm always fascinated by these things. BTW, I can see the house my mother grew up in and her high school (Robert E. Lee) in this pic.

[chisouthsider]

Originally Posted by Steely Dan

chicago's largest is the circle interchange where the dan ryan/kennedy intersects with the ike, just southwest of downtown, but it's an outmoded design from the 60s that has notorious back-ups. i've heard that it's the worst interchange in the nation in terms of back-ups.


source: http://upload.wikimedia.org/wikipedi...ge_Chicago.jpg

... He says while using a picture that shows the circle nearly empty .

But it's worth pointing out that the interchange actually has a very small footprint in the scheme of things. I'm anxious to see what happens when they eventually rebuild it.

[The Chemist]

Shanghai has a bunch of these, but the largest is probably the Xinzhuang Interchange in south Shanghai. It has 4 freeways (S4 - bottom right, S20 - top centre - centre right, G60 - centre left, Humin Elevated Road - top right) plus surface streets, and passes over both intercity and metro rail.

[LeeWilson]

Though not exactly a highway interchange, I've always found Toronto's Pearson Airport to be an impressive example of spaghetti manglery:

http://maps.google.ca/maps?hl=en&ll=...13164&t=k&z=17

[TarHeelJ]

More of Atlanta's Tom Moreland Interchange:


http://www.flickr.com/photos/sanon52...n/photostream/


http://www.flickr.com/photos/swampzo...n/photostream/

[TarHeelJ]

Atlanta's I-20/I-75/I-85 interchange:


http://www.flickr.com/photos/blech/2...n/photostream/


http://www.flickr.com/photos/benandl...n/photostream/

[davee930]

Man I've always loved these.

[SpawnOfVulcan]

Gah, I've been through that interchange with The Connector and I 20 a few times coming from Birmingham. I hate that thing...

Huntsville has one (I-565/US 231/US 431 plus Washington St, Jefferson St, and Oakwood Ave) that's about 3 to 4 miles long. It's more of a slender spaghetti, but it's no less confusing and ineffective (despite it's more recent construction).

[Centropolis]

I respect how Chicago generally has undersized expressway infrastructure-with some notable exceptions-in a city with otherwise massive infrastructure. If Chicago was in the sunbelt, the Circle would probably be the largest spaghetti clusterfuck east of California, or worse.

Of course, I've been stuck in fubar circle induced traffic ...mental convulsions.