The , 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 . 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.

History

The expressway was built between 1962 and 1967, partly in preparation for the

1964 Summer Olympics The , officially the and commonly known as Tokyo 1964 (), were an international multi-sport event held from 10 to 24 October 1964 in Tokyo, Japan. Tokyo had been awarded the organization of the 1940 Summer Olympics, but this honor was subseq ...

. In 2009, Tokyo private industries proposed funding a project to dismantle the elevated expressway and put them underground. 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 surrounding Nihonbashi Bridge as part of larger project to redevelop the financial district. Construction commenced with the permanent closure of the Edobashi and Gofukubashi entrance and exit ramps on 10 May 2021. Construction on the replacement tunnel is expected to be completed in 2035, making way for the removal of the bridge planned to be completed in 2040.

List of interchanges

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

Tokyo Tokyo, officially the Tokyo Metropolis, is the capital of Japan, capital and List of cities in Japan, most populous city in Japan. With a population of over 14 million in the city proper in 2023, it is List of largest cities, one of the most ...

References

{{coord missing, Tokyo AH1 C1 Ring roads in Japan Roads in Tokyo 1962 establishments in Japan