Roads

Ohashi Junction, Chuo-Kanjou-sen

170 metres by 100 metres
Ohashi Junction and the loop connection. You can see Shibuya in the background, Infoss Tower and Cerulean Hotel building where Google Japan are located
Ohashi Junction and the loop connection. You can see Shibuya in the background, Infoss Tower and Cerulean Hotel building where Google Japan are located

Central Tokyo Highways are a great site, built high above the ground, winding past apartment and office windows through the over-developed city below.

Despite a great subway and train system, roads are still an important part of transport for the city. The roads in Tokyo have struggled to find room to accommodate the growth of traffic and have had to therefore build highways in the sky and sometimes also tunnels underground.

The Circular Route. Tokyo Bay to the bottom right
The Circular Route Tokyo Bay to the bottom right

A road called the Central Circular Route has been under planning and construction for a long time now, and is almost coming to completion. It will link Ikebukuro, Shinjuku and Ohashi Junction (just below Shibuya) so that passage from Ikebukuro to the Tomei and Chuo Freeways is made much easier.

Map of the area where the road will run
Map of the area where the road will run

The Circular Route will later continue under Yamate Dori and join up with highways heading for Haneda Airport at Ooi Junction.

Some of the construction on this route is quite amazing to consider.

A look at the concrete structure that is the Ohashi Junction loop
A look at the concrete structure that is the Ohashi Junction loop

The road has been made by advanced tunneling machinery.

The machine that helps make the tunnel, sourced from Wikimedia
The machine that helps make the tunnel, sourced from Wikimedia
Inside the loop, sourced from Wikimedia
Inside the loop, sourced from Wikimedia
Inside the tunnel, sourced from Wikimedia
Inside the tunnel, sourced from Wikimedia

There have been a number of tours open for people to go inside and take photographs. The last one was a special premium tour for bloggers. Unfortunately I missed it or you would probably be scrolling down another set of 35 photos here.

A premium tour was being offered to bloggers at the beginning of Aug 2009. Shame I missed out on this !
A premium tour was being offered to bloggers at the beginning of Aug 2009. Shame I missed out on this !

The Circular Route between Shinjuku and Ohashi Junction is underground. To expel the exhaust fumes from the tunnel, tall chimneys have been built along the route. You can see these white chimneys in the photos I took recently from the Carrot Tower in Sangenjaya (close to Shibuya).

Docomo Tower, Yoyogi in the background. Can you spot some of the white chimneys?
Docomo Tower, Yoyogi in the background. Can you spot some of the white chimneys?

I am not sure what explanation residents along the route got about the exhaust chimneys, but I can not imagine they were too happy to hear about their construction.

One of the exhaust chimneys running along Yamate Dori
One of the exhaust chimneys running along Yamate Dori
White chimneys where the exhaust fumes will come out
White chimneys where the exhaust fumes will come out
Looking out at Shinjuku and Yoyogi. Can you see some of the white chimneys?
Looking out at Shinjuku and Yoyogi. Can you see some of the white chimneys?

The Ohashi Junction Loop is also quite an engineering feat. The loop road need to bring the cars from 35 metres underground out of the tunnel to 35 metres above ground to reach Highway 3, which is built above Route 246.

Hgihway 3 on top, Route 246 below, Tokyo Denen-Toshi line, then loop connection 1st and 2nd level. 70 metres from top to bottom
Hgihway 3 on top Route 246 below Tokyo Denen Toshi line then loop connection 1st and 2nd level 70 metres from top to bottom
Highway 3, running above Route 246, Roppongi Hills and Tokyo Tower in the background
Highway 3, running above Route 246, Roppongi Hills and Tokyo Tower in the background

The loop line moving cars a vertical distance of 70 metres is a huge structure. Its area is so large it could contain a normal size soccer pitch measuring 170 metres by 110 metres.

170 metres by 100 metres
170 metres by 100 metres
The Ohashi Junction connects the underground Circular Route from left to right and the North to South view here of Highway 3 traveling above Route 246.
The Ohashi Junction connects the underground Circular Route from left to right and the North to South view here of Highway 3 traveling above Route 246.

The route is planned to open next year in March.

More Information

About the author

Shibuya246

15 Comments

Click here to post a comment

Leave a Reply

This site uses Akismet to reduce spam. Learn how your comment data is processed.