Astounding Japanese Highways, Bridges & Interchanges
Japan saw most of its infrastructure bombed back to the stone age in the final years of World War II, which makes the country's post-war rejuvenation all the more astounding. Huge, complex public works projects saw a concrete & steel web of highways, bridges and interchanges blossom from the wreckage of war.
Today, shaped by the demands of restrictive space and economic boom & bust, Japan's hardened transportation arteries display artistic forms that go far beyond their functions.


(images credit: Ken Ohyama)
Above left is the Hakozaki Junction, part of the Metropolitan Expressway in Tokyo, and at right is the Hokko Junction in Osaka... These images illustrate the solution engineers used when building multi-lane highway interchanges in some of the world's most crowded cities in Japan: go vertical!


(images credit: Ken Ohyama)
Ken Ohyama has made it his mission to chronicle some of the more striking Japanese roadworks in a Flickr series called Interchange and a book of his photos available from Amazon. One of the more outstanding examples is The Hokko Junction shown above - a part of the Hanshin Expressway near Japan's second city, Osaka.

Also in Osaka is the Higashiosaka (East Osaka) Loop of the Hanshin Expressway. The photographer's technique gives the sweeping curve of the roadway an almost tubular appearance:

(images credit: Ken Ohyama)
When engineers have space to work with, they take full advantage. This wide field view of the Higashiosaka interchange shows the almost organic complexity of a busy cloverleaf, resembling a living creature's circulatory system with the vehicles acting as blood cells.

(image credit: zvkk)
Highways upon highways... without any end in sight:

(images credit: Andrew Yamaguchi, Sergei Mingazhev, Stassia)
One interesting feature of Japanese elevated highways: they often run above rivers or sea channels, using the available space above the water. Here are some of these "highways on the sea" -


(images credit: takasuuuui, kokix)
The incredible Japanese road infrastructure really took off in the 1960s - check out the vintage photo on the right: