From Gizmodo Is This the Craziest Bridge Ever Designed?
How to change from driving on the left to driving on the right:
I don't know if the "Pearl River Necklace bridge is the craziest bridge ever designed, but it sure looks like the most twisted one. It's a clever solution to a very real and obvious problem, however.
The bridge is part of a proposal by NL Architects to connect Hong Kong with mainland China. To do that, they had to solve a problem: In Hong Kong, people drive on the left side of the road. In mainland China, they drive on the right side. Here's the solution: A road flipper that physically twists the roads over each other.
I hope the project goes forward, because I've always wanted to drive in a gigantic Scalextric. [Design Boom]"
The craziest bridge ever designed is the bridge for the HOV lane from I495 west onto I270 north, in Rockville MD. It's crazy because it's a very long, high freeway bridge that is totally unnecessary. The other 3 lanes of I495 west just stay on the ground; for some reason the leftmost lane gets a giant bridge that takes it up in the air over nothing and back down again.