The ROSSI Interchange

[LA_MetroMan]

If there is a correct name for this type of modified cloverleaf, I'd love to know what it is.

Take a look at the following while reading below   [[ In Google or any other sat program, find 12320 Sylvan Street, North Hollywood, CA  ]]

There are a few of these interchanges in my part of L.A. and are great traffic savers, eliminating left turns.
Pricey, YES. The extra 4 bridges over a standard diamond interchange bumps up the cost.
Traffic handling capability: PRICELESS.  Notice the grade elevations of the ramps. NB and SB freeway ramps go under the NB boulevard ramps then over the boulevard itself. 180 flip and the opposing lanes do the same. Now, go north on that freeway to the next interchange (Sherman Way). This one is the same on the right side (EAST) except the freeway is now depressed under Sherman Way. See that the ramps are now opposite to the last interchange. Due to Whitsett Avenue on the WEST, they had to modify their ramping system, making the WEST side a diamond, making this a ROSSI DIAMOND interchange (LOL)

Have you seen any other freeway to boulevard interchanges like this in your hood ?

Reply here if so,

thanks

[NE2]

what

(I'd call it a braided cloverleaf, and it looks like others have independently come up with that, at least this guy: http://crossroadsinnovations.com/wp-content/uploads/2012/03/New-Interchange-Configurations-with-Reduced-Structural-Costs-30mar2012.pdf)

[pianocello]

Link to OP.

Heh, I'm surprised this particular geometry isn't included in NE2's link.

[NE2]

Heh, I'm surprised this particular geometry isn't included in NE2's link.

Huh? It's on the last page.

[colinstu]

Interchange reminded me of something we got in Milwaukee.

https://maps.google.com/maps?ll=42.982266,-87.916181&spn=0.007731,0.016512&t=h&z=17

The south-bound freeway movements are identical to that in the OP's CA example. The rest of this interchange has more to do with a diamond than anything else though.

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[LA_MetroMan]

Interchange reminded me of something we got in Milwaukee.

https://maps.google.com/maps?ll=42.982266,-87.916181&spn=0.007731,0.016512&t=h&z=17

The south-bound freeway movements are identical to that in the OP's CA example. The rest of this interchange has more to do with a diamond than anything else though.

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Actually, the WEST side of the freeway is NOT like the braided example I posted. If you notice, WB HOLT would have to make a leftie to get on to SB Freeway.

[Revive 755]

There's a variant with only one of the loops braided for the I-94/I-694/MN 252 interchange north of Minneapolis:

https://maps.google.com/maps?q=brooklyn+park,+mn&hl=en&ll=45.069467,-93.286403&spn=0.004527,0.008256&sll=45.213004,-93.260193&sspn=0.408744,1.056747&hnear=Brooklyn+Park,+Hennepin,+Minnesota&t=k&z=18

[LA_MetroMan]

Heh, I'm surprised this particular geometry isn't included in NE2's link.

Huh? It's on the last page.

Hmm, I didn't see this exact configuration. The closest one on the NE2 page doesn't have a left turn NOR does it have a loop back from NB BLVD to WB FRWY.  Unless the roadway for this ramp is so tightly (or even the same roadway) as the tail part of the exit to NB BLVD from the EB FRWY. If not, that particular route is not available. I'd certainly like to know the photo location to look it up on my sat program.

LA_MetroMan

[LA_MetroMan]

There's a variant with only one of the loops braided for the I-94/I-694/MN 252 interchange north of Minneapolis:

https://maps.google.com/maps?q=brooklyn+park,+mn&hl=en&ll=45.069467,-93.286403&spn=0.004527,0.008256&sll=45.213004,-93.260193&sspn=0.408744,1.056747&hnear=Brooklyn+Park,+Hennepin,+Minnesota&t=k&z=18

Close - but still missing the unique characteristics of the two originally posted. On your variant the top left loop remains at the same grade both under the SB Fwy offramp and the intersecting roadway unlike the up/down variant on the OP.

LA_MetroMan

[pianocello]

Heh, I'm surprised this particular geometry isn't included in NE2's link.

Huh? It's on the last page.

Wow. No idea how I missed that. Same interchange, even!

Hmm, I didn't see this exact configuration.

Last page, top center.

[LA_MetroMan]

Yepper -
Upon closer examination, it's the same - CA 170 at Victory Blvd.

[NE2]

I'm sure we're all waiting with bated breath for the answer... what the fuck does ROSSI stand for?

[flowmotion]

I-880 & CA-92 in Northern California has one braided leaf: http://goo.gl/maps/Ys9mF

Also under construction for I-405 & Wilshire Blvd in Socal:
http://www.metro.net/projects/I-405/wilshire-bl-ramps-reconstruction/

[kphoger]

I'm sure we're all waiting with bated breath for the answer... what the fuck does ROSSI stand for?

Really Odd Sort of Squirrely Interchange

[The High Plains Traveler]

There's a variant with only one of the loops braided for the I-94/I-694/MN 252 interchange north of Minneapolis:

https://maps.google.com/maps?q=brooklyn+park,+mn&hl=en&ll=45.069467,-93.286403&spn=0.004527,0.008256&sll=45.213004,-93.260193&sspn=0.408744,1.056747&hnear=Brooklyn+Park,+Hennepin,+Minnesota&t=k&z=18

When this interchange was first built, the SB-EB loop traffic had to weave through the EB-SB loop traffic. I think this was upgraded to what you see here in the 1990s.

[Alps]

I'm sure we're all waiting with bated breath for the answer... what the fuck does ROSSI stand for?

Really Odd Sort of Squirrely Interchange

http://rossidiamond.tumblr.com/

This doesn't answer any questions, and in fact raises new and disturbing ones. I need to wash myself now.

[LA_MetroMan]

I'm sure we're all waiting with bated breath for the answer... what the fuck does ROSSI stand for?

Well, actually - there were two sources for that:

1) The Division 14 Caltrans Engineer Lane Bender coined the term in 1954, which was named after his partner Mea Rossi. Mr. Rossi was killed by an angry homeowner who was served EMINENT DOMAIN papers for the Moronic Freeway.

2) The original posters last name just might be the same as the interchange name he could not identify.

Currently, no one true source has been identified.