That is seriously cool.
I'm glad things like this are still being built somewhere. You probably wouldn't be allowed to build the Golden Gate Bridge nowadays.
When I toured farther east, on the coast of Italy, the landscape was an endless series of mountains and valleys. The road was constantly alternating between long tunnels and immense viaducts (not as big as this one.) Superb engineering. The Italians still build a hell of a good road.