The , also known as the Trans-Tokyo Bay Expressway, is an expressway that is mainly made up of a

bridge–tunnel A bridge–tunnel is a persistent, unbroken road or rail connection across water that uses a combination of bridges and tunnels, and sometimes causeways, and does not involve intermittent connections such as drawbridges or ferries. Bridge–tun ...

combination across

Tokyo Bay is a bay located in the southern Kantō region of Japan, and spans the coasts of Tokyo, Kanagawa Prefecture, and Chiba Prefecture. Tokyo Bay is connected to the Pacific Ocean by the Uraga Channel. The Tokyo Bay region is both the most populous a ...

Japan Japan ( ja, 日本, or , and formally , ''Nihonkoku'') is an island country in East Asia. It is situated in the northwest Pacific Ocean, and is bordered on the west by the Sea of Japan, while extending from the Sea of Okhotsk in the north ...

. It connects the city of Kawasaki in

Kanagawa Prefecture is a prefecture of Japan located in the Kantō region of Honshu. Kanagawa Prefecture is the second-most populous prefecture of Japan at 9,221,129 (1 April 2022) and third-densest at . Its geographic area of makes it fifth-smallest. Kana ...

with the city of

Kisarazu is a city located in Chiba Prefecture, Japan. , the city had an estimated population of 136,023 in 63,431 households and a population density of 980 persons per km2. The total area of the city is . Geography Kisarazu is located in the midwest ...

Chiba Prefecture is a prefecture of Japan located in the Kantō region of Honshu. Chiba Prefecture has a population of 6,278,060 (1 June 2019) and has a geographic area of . Chiba Prefecture borders Ibaraki Prefecture to the north, Saitama Prefecture to the ...

, and forms part of National Route 409. With an overall length of 23.7 km, it includes a 4.4 km bridge and 9.6 km tunnel underneath the bay—the fourth-longest underwater tunnel in the world.

Overview

artificial island An artificial island is an island that has been constructed by people rather than formed by natural means. Artificial islands may vary in size from small islets reclaimed solely to support a single pillar of a building or structure to those tha ...

, , marks the transition between the bridge and tunnel segments and provides a rest stop with restaurants, shops, and amusement facilities. A distinctive tower standing above the middle of the tunnel, the Kaze no Tō (の, "the tower of wind"), supplies air to the tunnel, its ventilation system powered by the bay's almost-constant winds. The ¥1.44 trillion (US$11.2 billion) roadway opened December 18, 1997, after 23 years of planning and nine years of construction. The Tokyo Bay Aqua-Line shortened the drive between Chiba and Kanagawa, two important industrial areas, from 90 to 15 minutes, and also helped cut travel time from Tokyo and Kanagawa to the seaside leisure spots of the southern

Bōsō Peninsula The is a peninsula that encompasses the entirety of Chiba Prefecture on Honshu, the largest island of Japan. It is part of the Greater Tokyo Area. It forms the eastern edge of Tokyo Bay, separating it from the Pacific Ocean. The peninsula covers ...

. Before it opened, the trip entailed a 100 km journey along

and pass through central Tokyo. An explicit goal of the Aqua-Line was to redirect vehicular flow away from central Tokyo, but the expensive toll has meant only a limited reduction in central-Tokyo traffic. Many highway bus services now use the Tokyo Bay Aqua-Line, including lines from

Tokyo Station Tokyo Station ( ja, 東京駅, ) is a railway station in Chiyoda, Tokyo, Japan. The original station is located in Chiyoda's Marunouchi business district near the Tokyo Imperial Palace, Imperial Palace grounds. The newer Eastern extension is ...

Yokohama Station is a major interchange railway station in Nishi-ku, Yokohama, Japan. It is the busiest station in Kanagawa Prefecture and the fifth-busiest in the world as of 2013, serving 760 million passengers a year. Lines Yokohama Station is served by the ...

Kawasaki Station Kawasaki station may refer to: * Kawasaki-juku ( ja, 川崎宿, Kawasaki-shuku, Kawasaki lodging), a Tōkaidō waystation in Kawasaki-ku, Kawasaki, Kanagawa, Japan * Kawasaki Station ( ja, 川崎駅, Kawasaki-eki, Kawasaki Station, a train station ...

Shinagawa Station is a major railway station in the Takanawa and Konan districts of Minato, Tokyo, Japan, operated by East Japan Railway Company (JR East), Central Japan Railway Company (JR Central), and the private railway operator Keikyu. The Tokaido Shinkan ...

Shibuya Station is a railway station in Shibuya, Tokyo, Japan, operated jointly by East Japan Railway Company (JR East), Keio Corporation, Tokyu Corporation, and Tokyo Metro. With 2.4 million passengers on an average weekday in 2004, it is the fourth-busiest c ...

Shinjuku Station is a major railway station in the Shinjuku and Shibuya wards in Tokyo, Japan. In Shinjuku, it is part of the Nishi-Shinjuku and Shinjuku districts. In Shibuya, it is located in the Yoyogi and Sendagaya districts. It is the world's busiest rai ...

and

Haneda Airport , officially , and sometimes called as Tokyo Haneda Airport or Haneda International Airport , is one of two international airports serving the Greater Tokyo Area, the other one being Narita International Airport (NRT). It serves as the primary ...

Kimitsu is a city located in Chiba Prefecture, Japan. , the city had an estimated population of 83,058 in 39,138 households and a population density of 260 persons per km2. The total area of the city is . Geography Kimitsu is located in the southweste ...

, Nagaura station, Ichihara,

Mobara is a city located in Chiba Prefecture. , the city had an estimated population of 88,330 in 40,869 households and a population density of 880 persons per km². The total area of the city is Geography Mobara is located in an inland area of north-c ...

Tōgane is a city located in Chiba Prefecture, Japan. , the city had an estimated population of 57,780 in 26,907 households and a population density of 650 persons per km². The total area of the city is . Tōgane is home to the ''Kurenai-kai'' Scho ...

, Kamogawa, Katsuura and

Tateyama Tateyama may refer to: People with the surname * Midori Tateyama, Japanese writer * Shohei Tateyama (born 1981), Japanese baseball player * Yoshinori Tateyama (born 1975), Japanese baseball player * Homarefuji Yoshiyuki (born 1985), Japanese su ...

Tolls

The cash toll for a single trip on the Aqua-Line is ¥3,140 for ordinary-size cars (¥2,510 for

kei car Kei car (or , kanji: , "light automobile", ), known variously outside Japan as Japanese city car or Japanese microcar, is the Japanese vehicle category for the smallest highway-legal passenger cars with restricted dimensions and engine capacit ...

s); however, using the

ETC * Etc. or et cetera, a Latin expression meaning "and the other things" or "and the rest". ETC or etc may also refer to: Companies and organizations * ETC (Chilean TV channel), a Chilean cable television channel * ETC (Philippine TV channel), a P ...

(electronic toll collection) system, the fare is ¥2320 (¥1860 for kei cars). The ETC toll is reduced to ¥1000 on Saturdays, Sundays and Holidays. In general, tolls for usage of the Aqua-Line in either direction are collected at the mainline toll plaza on the Kisarazu end.

References

External links

Japan Highways site (in Japanese)
*
East Nippon Expressway Company

* * * * * * * * * {{Expressways of Japan Buildings and structures in Chiba Prefecture Buildings and structures in Kawasaki, Kanagawa Toll bridges in Japan Toll tunnels in Japan Road tunnels in Japan Undersea tunnels in Asia Bridges completed in 1997 Regional High-Standard Highways in Japan Roads in Chiba Prefecture Tokyo Bay Tunnels completed in 1997 Transport in Kawasaki, Kanagawa Articles containing video clips Immersed tube tunnels in Asia Bridge–tunnels in Asia Expressways in Japan 1997 establishments in Japan

Overview

Tolls

See also

References

External links