Pretzel Logic

One leftover from British control of Hong Kong until 1997 is that cars drive on the left side of the road. But on the mainland, Chinese drivers keep right, like traffic in North America.

So what do you do on a bridge between the two?

The Pearl River Necklace bridge is a clever solution to the very real and obvious problem of how to connect Hong Kong & the mainland.

The bridge is part of Dutch architects' proposal to solve the problem by constructing a "road flipper" that physically twists the roads over each other to change the traffic flow without changing lanes.

From Gizmodo