I think Miami has got a fair share of "spagetti" road construction!

This is what I consider as THE interchange. It may not be the most complicated, but it is where the two coast to coast (east to west) and border to border (north to south) freeways meet. I-15 from the Canada / US border in Montana to the Mexican border at San Diego (1435 mi.) and I-80 from Teaneck, NJ to San Francisco, CA. (2902 mi.). Coincidentally I-80 was finally completed in its coast to coast form in Salt Lake City and had an opening ceremony similar to the one for the completion of the transcontinental rail road. Which took place about 110 years before and about 60 miles to the north at the Golden Spike National Historic Site. Unfortunatly, it is not as historic that you could finally drive from coast to coast without having to stop (in theroy) or without seeing a stop light.

check this out in hawaii use the legacy database

This is the 405 & the 5 not the 405 & 101

This is the best one I've encountered.
The Florida Turnpike, I-95, Palmetto Expressway, US 441, SR 7, North Miami Beach Blvd., and the railroad all intersect there.
It is possible to take different routes through the interchange to get to the same place.

This one in Washington DC is under construction! You can see them building one of the roads.

In suburban Detroit, you better make sure you are in the correct lane to make your connection!

RL

My problem with this post (and the bookmark) is that it's wrong -- that is, the marked location is the wrong location! This NOT the 101 and 405 location, which is almost 40 miles north of here in the city limits of Los Angeles, California-- the marked location is the 5 and 405 split, known locally as the "El Toro Y", and is in Irvine, CA.

Can you please update your placemarker to show the correct information? Thank you!

This one south of Cincinnati reminds me of a bowtie. If you look closely, it has four levels all crossing in the center.