Inner Circular Route

Summary

The Inner Circular Route (都心環状線, Toshin Kanjō-sen), signed as Route C1, is one of the routes of the Shuto Expressway system serving the central part of the Greater Tokyo Area. The route is a complete loop around the central Tokyo wards of Chiyoda, Chūō, and Minato, with a total length of 14.8 kilometers (9.2 mi). In addition to serving areas of central Tokyo, the Inner Circular Route also serves as the origin of the radial routes of the Shuto Expressway. A section of the expressway is built above the Shibuya River.

Shuto Urban Expwy Sign C1.svg
Shuto Expressway Inner Circular Route
首都高速都心環状線
The Inner Circular Route highlighted in red
Route information
Part of AH1
Maintained by Metropolitan Expressway Company Limited
Length14.8 km (9.2 mi)
Existed1962–present
Major junctions
Beltway around Tokyo
Major intersections
Location
CountryJapan
Highway system

HistoryEdit

The expressway was built between 1962 and 1967, partly in preparation for the 1964 Summer Olympics. In 2009, Tokyo private industries proposed funding a project to dismantle the elevated expressway and put them underground.[1]

In May 2020, the Shuto Expressway Company received approval for plans to relocate 1.8 kilometers of the expressway underground between Kandabashi and Edobashi Junctions, in the area where the Nihonbashi Bridge is located.[2] Construction will commence with the permanent closure of the Edobashi and Gofukubashi entrance and exit ramps on 10 May 2021.[3][4] Construction is expected to be completed in fiscal year 2040.[4]

List of interchangesEdit

List of interchanges ordered clockwise beginning with Edobashi Junction. The entire expressway is in Tokyo.

Locationkm[5]miExitNameDestinationsNotes
Chūō0.00.0Edobashi  Ueno Route north – Ueno
        Mukojima Route north – Narita, Bayshore Route, Fukagawa Route, Tōhoku Expressway, Keiyō Road
Clockwise entrance, counterclockwise exit; distance posts reset to zero, eastern terminus of AH1
0.80.5011TakarachōYaesu-dōriClockwise exit, counterclockwise entrance
1.00.62KyōbashiSpur route to Tokyo ExpresswayClockwise exit, counterclockwise entrance
1.60.9912KyōbashiKajibashi-dōri – Kyōbashi, EitaibashiClockwise entrance, counterclockwise exit
1.7–
1.9
1.1–
1.2
13/14ShintomichōTokyo Metropolitan Route 50 (Shin-Ōhashi-dōri) – Shin-Ōhashi, Tsukuda, ShiodomeExit only
2.0–
2.5
1.2–
1.6
15/16GinzaGinchū-dōri
3.22.018ShiodomeKaigan-dōri – ShinbashiClockwise entrance, counterclockwise exit
3.42.1Shiodome  Yaesu Route north – Kita-Ikebukuro, Shin-KyōbashiClockwise entrance, counterclockwise exit
Minato4.32.7Hamazakibashi         Haneda Route south – Haneda, Bayshore Route, Yokohane Route, Daiba Route, Tokyo Bay Aqua-Line, Higashi-Kantō Expressway
5.2–
5.7
3.2–
3.5
19/20Shiba-kōen  Tokyo Metropolitan Route 319 – to National Route 1, Hibiya, Roppongi, Kanasugi Bridge, Shinagawa
6.64.1Ichinohashi  Meguro Route south – Meguro, Togoshi
7.24.521IikuraTokyo Metropolitan Route 415 (Azabu-dōri) – Roppongi
7.84.8Tanimachi   Shibuya Route west – to Tōmei Expressway, ShibuyaClockwise beginning of AH1 concurrency
Chiyoda8.8–
9.2
5.5–
5.7
23/24KasumigasekiTokyo Metropolitan Route 415 (Roppongi-dōri) – Hibiya, Hanzōmon, Nagatachō
10.26.3Miyakezaka   Shinjuku Route west – to Chūō Expressway, Shinjuku
11.67.225DaikanchōUchibori-dōri – Kitanomaru ParkClockwise exit, counterclockwise entrance
12.07.526KitanomaruUchibori-dōri – HitotsubashiClockwise entrance, counterclockwise exit
12.37.6Takebashi  Ikebukuro Route north – Ōmiya, Kita-Ikebukuro
12.9–
13.2
8.0–
8.2
28/29KandabashiHibiya-dōri – Ōtemachi
13.38.3Kandabashi  Yaesu Route south – Marunouchi, ShinbashiClockwise exit, counterclockwise entrance
Chūō14.08.730Gofukubashi  Tokyo Metropolitan Route 405 (Sotobori-dōri) – Tokyo StationClosing 10 May 2021[4]
Clockwise entrance, counterclockwise exit
14.28.831EdobashiTokyo Metropolitan Route 316 (Shōwa-dōri)Closing 10 May 2021[4]
Clockwise exit, counterclockwise entrance
1.000 mi = 1.609 km; 1.000 km = 0.621 mi

ReferencesEdit

  1. ^ Keisuke Okada (17 March 2012). "Push to replace Tokyo's aging expressways with tunnel routes revived". The Japan Times. p. 3. Retrieved 20 July 2020.
  2. ^ "首都高速道路日本橋区間の地下化事業の都市計画事業認可について" [The Gofukubashi and Edobashi ramps on the downtown loop line will be abolished at midnight on 10 May 2021 (Monday).] (Press release) (in Japanese). Shuto Expressway. 21 May 2020. Retrieved 16 March 2021.
  3. ^ "都心環状線 呉服橋出入口・江戸橋出入口を2021年5月10日(月)午前0時に廃止します" [The Gofukubashi and Edobashi ramps on the downtown loop line will be abolished at midnight on 10 May 2021 (Monday).] (Press release) (in Japanese). Shuto Expressway. 26 January 2021. Retrieved 16 March 2021.
  4. ^ a b c d "首都高、2021年5月10日に呉服橋・江戸橋出入口を廃止". news.yahoo.co.jp (in Japanese). Yahoo! News (Japan). 8 February 2021. Retrieved 16 March 2021.
  5. ^ Google (23 July 2020). "Inner Circular Route" (Map). Google Maps. Google. Retrieved 23 July 2020.