"Most Complex Junctions" Hall of Fame:
- Shanghai, China
(see that little circle on the side: this is a trap for amateur drivers, in which they swirl around forever)
- Taganskaya Square, Moscow
(shaped like a huge dumb loaf of bread... and just as unpalatable)
- Tokyo, Japan
(this one's actually quite elegant)
- Arc de Triumph, Paris
(Place Charles de Gaulle - pretty much free-for-all there)
Nice Chicago arrangements:
You also gotta love this one in Minneapolis:
(between 35W and 94)
Golden Glades interchange in N. Miami Beach, FL.
Looking like some strands of yarn: Rt. 440 in New Jersey:
(images courtesy Google Earth)
Magic Roundabout
Something to shock you into disbelief, and leave you utterly shattered: getting in and out of the "magic mushroom circle" in England:
There are three intersections like this in UK: in Swindon, Hemel and in Cardiff. See exactly how it works here and here.
A cheat sheet "how to get out" is more helpful:
China is at the forefront of traffic circles (and spiral bridge approaches), as well:
Some vintage visions of intersections
Little did the urban planners of yesteryear and futurist designers imagined how complex our traffic infra-structure would become. The closest perhaps was the "Futurama" display in the 30s:
Looks actually quite orderly:
There is a highway in my basement
Another solution for the busy intersection: put a "traffic-control" tower smack in the middle (and on top) of it!
This strange concoction comes from "Modern Mechanics" 1932 issue and is called "Safety Tower" - basically a multi-level interchange, with space above it used for businesses and entertainment (including air traffic control beacons!)
(image credit: Modern Mechanix)
Amazingly, same idea came to Russians recently, as they put a huge "flying saucer" mall on top of major intersection: see here
and of course, a humorous solution (that might just work in Russia, who knows)
Railway intersections: "Diamond Crossings"
Quite a few of them can be found in US, but not that many in the rest of the world. US railway companies liked this kind of intersection which does not allow a train switch to a rival company's tracks. 
Here is a couple: in Poland and Russia:
(original unknown)
Traffic Jams from Hell
What a better way to greet Monday than to publish a collection of horrendous traffic congestion pictures, which may cause even most patient driver to shudder and say "Boy, am I glad I'm not in this mess right now".
First picture is taken from the window of Red Hat's offices in Sao Paulo, Brazil, followed by various location around the world, with Russia featured quite prominently -
(image credit: Glommer's Mind)
Bucharest, Romania
Unregulated mess somewhere in Russia:
Here is the classic traffic jam that terrorized Moscow Sadovoye Koltzo (ring road) in October 2007:
Continuing well into the night:
(images credit: Anton Nossik)
This particular congestion is not actually a traffic jam. It happened in Italy during the strike, creating bottle-necks for trucks at the border:
(still very hairy situations with long waits involved) -
(original unknown)
Jacek Yerka's unique solution to urban traffic problems, in surreal light:
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