I'm surprised nobody has mentioned the massive interchange with the NJ Turnpike with I-78 right near Newark International Airport. I drove on that sucker recently, and if I'm correct with my count, I counted some 18 lanes of NJ Turnpike just north of that major interchange...

There's another notable ginormous stack interchange right near the Eastern terminus of I-70 west of Baltimore... That's four levels anyway...

Amazing shots.

Do teabaggers ever protest about the $$$$$ spent building/maintaining these monstrosities?

It's probably the busiest in the area, but if you include the suburbs, I'd say the 355/55 in Bolingbrook and the 94/80 split in South Holland (both recently rebuilt) are taller, bigger, and more impressive from an engineering standpoint.

And if we go by area and the number of ramps, cases can be made for the Hillside Strangler and the 190/90/294 interchange in Rosemont. They're Chicago's equivalents of the East LA interchange.

When they rebuild the 90/290 interchange in Schaumburg and incorporate all those collector/distributor ramps for adjacent exits, that will be Chicago's answer to the Dallas High 5 or the 105/110 in LA.

Several interchanges in Barcelona are integrated with parkland and plaza space, which is pretty cool.

Plaça de los Glories Catalanes

http://farm2.staticflickr.com/1074/4...6627717b_b.jpg
source
http://i.uride.it/b/p1432_C3z9e.jpg
source

Parc de la Trinitat

http://2.bp.blogspot.com/_Ymx9e66vrG...00/nudo8uh.jpg

http://2.bp.blogspot.com/_Ymx9e66vrG...600/241688.jpg
source



There's also the rail version... built OVER a highway interchange.

Nus de Mollet

http://farm8.staticflickr.com/7222/7...051e5846_c.jpg
source
http://farm7.staticflickr.com/6033/6...c2c1a5ab_z.jpg
source

nyc's best spaghetti junction isnt for cars, its for rail. since 1884, its broadway junction in eastern brooklyn:

http://forum.skyscraperpage.com/showthread.php?t=180454

Off the top of my head the most complicated major road junction (i.e. ignoring the magic roundabouts) in the UK is probably Gravelly Hill Interchange (aka Spaghetti Junction) in Birmingham. The junction consists of several roads, a roundabout, a railway line, and several canals and rivers.

http://upload.wikimedia.org/wikipedi...i_Junction.jpg
Source: Wikipedia: http://en.wikipedia.org/wiki/Gravelly_Hill_Interchange


The closest London has to a complicated junction is probably Clapham Junction which dates back to 1838 (brick viaduct) and is technically composed of a variety of different junctions’ criss-crossing each other: https://maps.google.co.uk/?ll=51.471...32187&t=k&z=15

I'm surprised nobody has posted Spaghetti Junction in Louisville.

Anthony Henday Drive (hwy 216 - ring road) and Hwy 2 interchange in Edmonton;

http://www.hotmixmag.com/images/vol1...oad-canada.jpg

Deerfoot Trail / HWY 22x interchange plans (currently under construction) in Calgary: (PDF)

Link.

SR 520 (Washington)/RH Thomson Expressway. This one was never built, but it would've been interesting:

http://farm4.staticflickr.com/3589/3...4f2f8e61_b.jpg
Answers, at last! by hey skinny, on Flickr

The RH Thomson was never built (except for a small section of unused roadway on the south end of the interchange), so the interchange was only partially built (2 ramps connect 520 to Lake Washington Blvd and the one which would've gone from northbound RH Thomson to westbound 520 is unused except for people diving into Lake Washington (the area around the interchange was never filled in)). What is there currently will be removed when 520 from I-5 to the Evergreen Point floating bridge is rebuilt.

Louisville's Kennedy Interchange
http://farm5.staticflickr.com/4081/4...a5bc70db_z.jpg
http://www.flickr.com/photos/pikmin/...n/photostream/

Yes. Vigorously and frequently. Governement spending in general in a bete noir for them.

Illinois DOT is looking at various alternatives for reconstruction of the Chicago Circle Interchange. Of course, it isn't funded yet, so no one can predict when this might happen. There have been a couple of meetings to talk with stakeholders about various considerations, and the preliminary alternatives were released yesterday. PDF here. IDOT is mainly concerned about improving the throughput/reducing the backups on north-to-west and east-to-north movements, so at a minimum the alternatives give two lanes for both those ramps. Most of the alternatives also make the Dan Ryan four lanes all the way through (rather than the current three) and some push five through.

One funny thing is that they haven't yet sketched out the vertical dimensions, and some of the alternatives create nearly complete Texas-style stack interchanges that would rise 50 feet or more above the surrounding streets. I'm not crazy about that, and I think the speed gained by smoothing out the curves will be largely defeated (especially for trucks) by the elevation change required.

As a freeway historian, I'm reluctant to see the Circle's historic, almost-unique design completely blown away, but I think that will be a hard argument to make to the folks in charge of this.

We have a discussion of this going in the Chicago transportation thread.

It is funny you posted tis, I was just in Seattle 3 days ago and drove through this interchange, saw the ghost ramps, and had to wikipedia it when I got home, hehe.

:previous: WHere in Seattle is that? I was there last year. Granted I didn't drive at all when I was there, but I was on I-90 (east of town) and I-5. Is it near either of those?

I saw a couple of very large interchanges as we rode along the light rail line between Sea-Tac and downtown... I-5 and I-405? Or 205?

:previous:Its on the 520 (toll bridge)

Only half of the interchange was built, many stubs, two ramps that are being used and a third one that is not.

That's cool ... Google Map

The I-5/SR-22/SR-57 AKA, the "Orange Crush" in Orange County, CA:


http://graphics8.nytimes.com/images/...ine2/popup.jpg



http://img125.imageshack.us/img125/8...a22ca57jr0.jpg

All that is missing are those motorcycle cops from CHiPs

East Hartford, CT

http://img545.imageshack.us/img545/1026/ehartmix.png
http://goo.gl/maps/rSm89

North Austin

I-35/Texas 45
http://goo.gl/maps/YTidl

I-35/US 290 US 290 connects Austin to Houston. - Killer view of downtown/UT skyline via Google Streetview. - http://goo.gl/maps/19M8k
http://goo.gl/maps/5RknX

I-35/US 183
http://goo.gl/maps/2cDAo

US 183/Loop 1
http://goo.gl/maps/D14MD

US 183/Texas 45
http://goo.gl/maps/8l7f7

South Austin

I-35/Texas 71 They just opened the last two sections of the flyovers. This is the tallest flyover in the city with 5 levels and 120 feet high. Killer view of downtown in Google Streetview image: http://goo.gl/maps/adzr2
http://goo.gl/maps/WohIF

US 290/Texas 71/Loop 1
http://goo.gl/maps/E0by8

US 290/Texas 71/Loop 360
http://goo.gl/maps/yuroy

More photos and construction photos:
http://www.texasfreeway.com/Austin/C...truction.shtml