What's the most original intersection/interchange you've ever seen?

[tradephoric]

Here is a real life example of a terminal DDI:
https://www.google.com/maps/@39.15612,-76.74517,425m/data=!3m1!1e3

...which appears to be the exact same one I posted to start off this lively discussion.

Oops.  Didn't notice.

[Henry]

If you've ever been on alpsroads.net, you've probably noticed these massive interchanges:

[jbnv]

If you've ever been on alpsroads.net, you've probably noticed these massive interchanges: <snip>

Do these represent real interchanges or just concepts?

[CNGL-Leudimin]

Sometimes I imagine how metro systems would look like if they were freeways. When three or more lines meet, things get interesting. I still have to do New York, however...

[Henry]

If you've ever been on alpsroads.net, you've probably noticed these massive interchanges: <snip>

Do these represent real interchanges or just concepts?

Clearly, those are concepts of interchanges that most likely don't exist. However, I can see the one on the bottom exist somewhere in the real world.

[paulthemapguy]

This is an interchange concept I designed at age 18, wondering what I would do if three interstates intersected at the same place.  All vehicles have a ramp connection to all directions on all other highways.  Takes up a lot of ROW but I tried to keep most ramps within the triad of thru-lanes.

[tckma]

How about this one?

[jbnv]

How about this one?

Did they really need to keep that piece of Hwy. 978?

[tckma]

Did they really need to keep that piece of Hwy. 978?

Judging by GMSV, it isn't signed as such.  It's signed as "To South US-301," or "To East MD-214," for example.

[D-Dey65]

cl94 posted a link that also lead to another one. I believe I-10 and US 29 has something similar to what's here. Also, below that is an example of how to screw up the traffic flow for cloverleaf interchanges with suburban sprawl. Another example is the cloverleaf between Suffolk CR 97 and the service roads of NY 27.



BTW, if we're going to go with fictional interchanges as Paul The Map Guy did, does anybody remember my invention known as the Pelham Interchange?

[tckma]

. Another example is the cloverleaf between Suffolk CR 97 and the service roads of NY 27.

I had an uncle who lived in Islip.  I remember my father constantly complaining about the interchange between NY-27 and Connetquot Avenue (which when I was a kid I thought he was saying "Connecticut Ave"), about how it was confusing to have to get on the C/D road (he doesn't know that term and back then I didn't either).  I just remember him consistently passing the exit and having to turn around on Montauk Highway.  The exits around there make no sense.  Why bother with a cloverleaf between Suffolk CR 97 and NY-27 if you can't get from 97 south to 27 east without exiting again at the next exit off 27?

[Henry]

BTW, if we're going to go with fictional interchanges as Paul The Map Guy did, does anybody remember my invention known as the Pelham Interchange?

What did that look like? Do you still have a pic?

And while we're on the subject, here are the intersections/interchanges that I've dreamed up:







The complete details are found here.

[jbnv]

an example of how to screw up the traffic flow for cloverleaf interchanges with suburban sprawl.

This is a common problem in Louisiana. The frontage roads have their own intersections, and traffic backs up very easily on those roads. For example, I-10 at US 61.

[D-Dey65]

What did that look like? Do you still have a pic?

I have it somewhere in my files, and I also had a link, but ImageShack deleted it.