A few of mine:
THE MAZE
7 levels of glorious insanity.
It's at the Y-junction of two busy highways, and connects to multiple frontage streets in Riverside (the neighbourhood at the top). In the process, the highest road rises up to 60m off the ground, while the lowest point is 24m beneath it (a long bypass onramp originating in the neighbourhood that has to duck under some offramps and a subway).
To the bottom, the tunnels lead the highway underneath the CBD, through two more underground interchanges, and then into the industrial district beyond. The right highway leads to Farside, a dense, primarily residential area, while the left one leads away from the city.
This one started innocuously enough, as one of the standard 3-way interchanges sprinkled across the map. Unfortunately, the traffic (and the city) outgrew my limited abilities to modify those ones, leading to a few different iterations before resulting in the design you see here.
The Farside Triangle
Which way am I going again?
Unlike the Maze, this one started basically from scratch. I decided to put a neighbourhood here (Farside), so I built a few on- and offramps. Then, later on, the highways around the CBD and industrial areas started expanding, so I extended them down here (the bottom roads - the bridges lead to the Maze).Thus was born this insane, vaguely triangular stack interchange, which connects to several frontage roads in Farside (and, like before, underpasses part of the district in a few places to ease congestion). It's not as heavily-trafficked as the Maze (though that is liable to change), and at the moment has no real congestion issues.
The weirdest bit of this interchange in my mind is the two long flyover ramps to and from the northbound main highway (the picture is looking east-northeast). Oh, and that little street at the bottom there isn't connected to the interchange at all - it's just kinda there.
The Downtown Tangle
Why is there a train on the onramp?
This one was a lot of fun to build, if only for those crazy flyovers. It's at the southwestern corner of the CBD (opposite from the Maze), and connects the CBD loop highway to the bridges to Farside. The area around it is my next planned expansion of the CBD, so it's liable to get much busier soon (plus even more tangled, as I add more frontage roads that need onramps). It's got a few bits I don't like (most notably a tendency towards weaving on the southbound lanes), but overall I like how it turned out (and the fact that I'll be able to put buildings in some of the gaps). The rail line leads to the downtown passenger train station, and the rail tunnels lead to the city's deep-underground rail network.
THE WHOLE THING
What do you mean, going in circles?
Taken together, this is what all these interchanges add up to. What you don't see in that image is the two ADDITIONAL interchanges located underneath the city, between the Maze and the industrial district on the far right (this image is looking southeast). One leads to a highway that runs directly underneath the CBD, while the other emerges and becomes the far-right loop road. Also not seen is the extensive underground rail network that connects the industrial-area train stations with the outside world, to prevent greater congestion, as well as the maze of on- and offramps in the industrial quarter. At the top is the Farside Triangle, the Downtown Tangle is on the far right, and the Maze is left-of-center.
