Skyscraper City Forum banner
1 - 12 of 12 Posts

·
Registered
Joined
·
9,555 Posts
Discussion Starter · #1 ·
So many major cities throughout the world, like Boston, Seoul and San Francisco, have gotten rid of the elevated controlled-access highways that cut through them. In most cases, they would be replaced by boulevards or underground controlled-access highways. But space would be made for new parks and mixed-use urban areas.

I think there have been some suggestions floating around that Tokyo should remove some portions of its extensive Shuto Metropolitan Expressway network. A reason I think freeway removal in Tokyo would be difficult is because of the city's extensive subway system. I wouldn't want construction crews building any new highway tunnels to accidentally burst through one of Tokyo's many subway lines.

Any other opinions/thoughts on this?
 

·
Registered
Joined
·
4,121 Posts
So many major cities throughout the world, like Boston, Seoul and San Francisco, have gotten rid of the elevated controlled-access highways that cut through them. In most cases, they would be replaced by boulevards or underground controlled-access highways. But space would be made for new parks and mixed-use urban areas.

I think there have been some suggestions floating around that Tokyo should remove some portions of its extensive Shuto Metropolitan Expressway network. A reason I think freeway removal in Tokyo would be difficult is because of the city's extensive subway system. I wouldn't want construction crews building any new highway tunnels to accidentally burst through one of Tokyo's many subway lines.

Any other opinions/thoughts on this?
I dunno much about this..........but some of the roads actually go through some buildings

Gate Tower Building in Osaka comes to mind



https://en.wikipedia.org/wiki/Gate_Tower_Building
 

·
Moderator
Joined
·
48,056 Posts
I think the most advanced plans are for the removal of the Shuto Loop Line at Nihonbashi. There are several metro lines that they will need to pass if they are bury the road, including the good old Ginza Line.

Of course they will design a new road tunnel with the metro tunnels and all the other obstacles in mind and they will burst through another one. But it does make it more difficult, maybe even too difficult resulting in not replacing the highway, diverting the traffic through the city on the existing roads on street level.

With most of the elevated roads being on top of water or other major roads there isn't too much to gain by removing them anyway. Okay, the rivers fronts can be enhanced, which could be very positive for the city. But in places where they don't run above the water no new places will created for development.

I think it's more likely that the elevated roads will be turned into elevated tunnels by covering the existing viaducts, this will result in a reduction of noise levels along these roads. But that will also making them more prominently visible in the streets.
 

·
Registered
Joined
·
481 Posts

·
Moderator
Joined
·
48,056 Posts
Shuto Express Way Nihonbashi Tunnel 首都高日本橋地下化

The ministry of Land and Infrastructure has revealed its proposal for the tunneling of the Shuto Expressway Loop Line Nihonbashi section. If it goes ahead the tunnel will replace the old elevated road that runs above the Nihonbashi River and it's historic bridges. It will open up the river, benefiting the redevelopments in this area by making the riverbanks more attractive for creating good public space.

documents:
http://www.mlit.go.jp/road/ir/ir-council/exp-ug/doc02.html

http://www.mlit.go.jp/road/ir/ir-council/exp-ug/pdf02/02.pdf
http://www.mlit.go.jp/road/ir/ir-council/exp-ug/pdf02/03.pdf


From west to east the new tunnel will start at the current entrance of the Shuto Expressway Yuasu Line, the road that runs in a tunnel at the back entrance of Tokyo Station. This tunnel entrance will be improved, a new underground junction will be created for the split of the Loop Line and the Yaesu Line. The new tunnel will first follow the riverbank underneath Yaesu 1-Chome and Nihonbashi 1-Chome. Then it will cross the river right underneath the Nihonbashi Bridge. After 1.8 km it will come above ground right underneath the current Edobashi JCT.

Because it becomes a tunnel the Loop Line will lose all it's entrances and exits in Nihonbashi. The Loop will also be cut as it won't be possible anymore to drive from the west via the Edobashi JCT to the Loop line heading South to Ginza. Not that it really matter as the route via the Yaesu Line is already shorter.

On it's way the tunnel has to avoid the metro tunnels of the Hanzomon Line, the Ginza Line, the Toei Asakusa Line and a tunnel with communication lines.

If the plan is approved it will only go U/C after 2020.



Current situation




Future situation

Yellow = new tunnel / ramps
Red = Existing Expressway remaining
White = Elevated sections that will be removed.
Purple/Pink/Orange = Metro tunnels

 

·
Moderator
Joined
·
48,056 Posts
Another proposal has popped up.

Tsukiji River Amenity Plan 築地川アメニティ構想

This one is a plan by the Chuo Ward to cover up the Shuto Expressway Loop Line between the Hamarikyū Gardens and the Chuo ward city office. This part of the road used to be the Tsukiji River and is already below street level so it should be easy to cover it up.

By covering the road it does mean that there are no plans to bring back Tsukiji River. But the space that will be created on top of the road will become a large pedestrian zone / park. Which should bring Ginza and Tsukiji closer together as the barrier which is the road is removed.

No time frame is given for when this could be constructed, but as the road only needs to be covered it would not take too much time to complete this.

Together with the covering of the road Chuo-ward will look into the possibilities of several large scale redevelopments along the route. Especially some of the older offices at the spot where the road has an S-bend, but also the current ward office building.

sources:
https://www.kensetsunews.com/archives/364513

https://ameblo.jp/maronrepo2013saisyohagu/entry-12524538226.html

https://twitter.com/Mr_Tarinn/status/1171573453050114049








 

·
Registered
Joined
·
9,555 Posts
Discussion Starter · #8 ·
Last June, RegentHouse mentioned the possibility of taking more of the Tokyo Expressway underground. Then, Momo1435 stated that in the long term, there would be a possible undergrounding of the Tokyo Expressway between the Nishi-Ginza junction and the Kyobashi junction. According to Momo, this implies a plan to connect the Yaesu Route with the Kyobashi Junction as the Edobashi Junction will lose a couple of connections with the Nihonbashi undergrounding. Any such plan would also create some development opportunities for Ginza and Kyobashi.

 

·
Moderator
Joined
·
48,056 Posts
The major of the Chuo-ward has proposed another freeway removal.

This plan is for the KK Expressway, the short elevated freeway in Ginza. His plan is not to demolish the viaduct, but to turn into an elevated green pedestrian avenue similar to the High Line in New York.

The current road is a free way, the income from renting out the spaces underneath the viaduct is paying for the maintenance. This money can also be used for the maintenance of this park replacing the road.

The article doesn't give a timeline on when this should be completed.

source:
https://r.nikkei.com/article/DGXMZO51229730R21C19A0L83000?n_cid=TPRN0003




 

·
Banned
Joined
·
1,668 Posts
High Line hype is more appropriate for places like Shibuya. I'd rather see it removed if the freeway is being undergrounded anyway, and build a linear park connecting with existing space like Sukiyabashi Park, in one of Central Tokyo's most dense areas. It would connect Ginza to Yurakucho back again.

Also, it doesn't really make sense to underground the freeway south of Miyuki Dori, because it runs right along the railroad viaduct, and that isn't going anywhere.
 

·
Moderator
Joined
·
48,056 Posts
Work has started on the removal of the freeway above the Nihonbashi River in Nihonbashi.

The Edobashi and the Gofukubashi bashi entrance / exit were closed 2 months ago to be removed. This is to create space for to construction of the new tunnel that will replace the viaduct.


1736356


1736357


source:
 
1 - 12 of 12 Posts
Top