Ken-Ō Expressway

Ken-O at North Hachioji

The Ken-O Expressway (圏央道, Ken-Ō Dō^?), or Metropolitan Inter-City Expressway (首都圏中央連絡自動車道, Shuto-ken Chūō Renraku Jidōsha-dō^?), is a partially completed ticket system toll expressway in Japan, owned and operated by the Central Nippon Expressway Company and East Nippon Expressway Company. In conjunction with the Tokyo Bay Aqua-Line and the Bayshore Route of the Shuto Expressway, it will form a full outer ring road of Tokyo. It is assigned the national highway Route 468 number.

Portions of the existing Yokohama-Yokosuka Expressway, Shin-Shōnan Bypass and Chiba-Tōgane Road and the planned Yokohama Ring Expressway will be incorporated into the road.

The section owned by the Central Nippon Expressway Company runs from the east end of the Shin-Shōnan Bypass west along the bypass and north to interchange 42. The rest is owned by the East Nippon Expressway Company.

Route description

The expressway will begin at the south end of the Bayshore Route in Yokohama, where it will head west on the existing branch of the Yokohama-Yokosuka Expressway to that road's main line. At the junction with the main line, the current expressway ends; ramp stubs are present to continue the road west. It will split from the planned Yokohama Ring Expressway and continue west to the east end of the Fujisawa Bypass (part of Route 1). An upgrade of that road will take it to the existing Shin-Shōnan Bypass, an expressway, which it will split from as that road turns towards the south.

The Ken-O Expressway will then head north, crossing the Tōmei Expressway and Chūō Expressway. North of the latter road, the present expressway begins, heading north and northeast to the junction with the Kan-Etsu Expressway. There it will continue east across the Tōhoku Expressway and Jōban Expressway; a short piece from the Joban Expressway east to the next interchange has been opened. It will turn southeast, crossing the Higashi-Kantō Expressway east of Narita Airport, and then running south to the present end of the Chiba-Tōgane Road, a two-lane expressway. Where that road abruptly turns west, the Ken-O Expressway will continue south, looping west to and at the junction of the Tokyo Bay Aqua-Line and Tateyama Expressway.

Exit list

Sections not yet opened are shown with a red background.

Number	km	Name	Intersecting routes	Opened	Notes
		Namiki (並木)	Shuto Expressway Bayshore Route; Route 357		counterclockwise exit and clockwise entrance
		Horiguchi Noukendai (堀口能見台)	Route 16		counterclockwise exit and clockwise entrance
		Kamariya Junction (釜利谷)	Yokohama-Yokosuka Expressway; Route 16 bypass
		Kuden (公田)
		Sakae? Junction (栄)	Yokohama Ring Expressway
		Fujisawa (藤沢)	Route 1	March 30, 1988
		Chigasaki? (茅ヶ崎中央)		March 30, 1988
		Nishikubo Junction (西久保)	Shin-Shōnan Bypass; Route 1 bypass
		Samukawa South (寒川南)
		Samukawa North (寒川北)
		Ebina South Junction (海老名南)	Second Tōmei Expressway
		Ebina North Junction (海老名北)	Tomei Expressway
		Ebina North (海老名北)
		Atsugi (圏央厚木)	Route 129/Route 246
		Sagamihara (相模原)	Route 129
		Shiroyama (城山)
		Hachiōji South (八王子南)	Route 20 bypass
40		Hachiōji Junction (八王子)	Chūō Expressway
41		Hachiōji West (八王子西)
42		Akiruno (あきる野)	Route 411	March 21, 2005
43		Hinode (日の出)		March 29, 2002
44		Ōme (青梅)		March 26, 1996
45		Iruma (入間)	Route 16	March 26, 1996
		Sayama Parking Area (狭山PA)		July 18, 2008
46		Sayama Hidaka (狭山日高)		March 26, 1996
47		Tsurugashima (圏央鶴ヶ島)		March 26, 1996
50		Tsurugashima Junction (鶴ヶ島)	Kan-Etsu Expressway	March 26, 1996
		Sakado (坂戸)
		Kawashima (川島)	Route 254
		Okegawa Junction (桶川)	Route 17
		Okegawa (桶川)
		Shōbu Shiraoka (菖蒲白岡)	Route 122 bypass
		Kuki Shiraoka Junction (久喜白岡)	Tōhoku Expressway
		Satte (幸手)
		Goka (五霞)	Route 4 bypass
		Sakai (境)	Route 354 bypass
		Sarusima Iwai (猿島岩井)
		Mitsukaidō (水海道)	Route 294 bypass
		Tsukuba (つくば)
80		Tsukuba Junction (つくば)	Jōban Expressway	March 29, 2003
81		Tsukuba Ushiku (つくば牛久)	Route 6 bypass	March 29, 2003
		Ami (阿見)
		Ami East (阿見東)
		Edosaki (江戸崎)
		Azuma (東)
		Kanzaki (神崎)	Route 356 bypass
		Shimofusa (下総)
		Taiei Junction (大栄)	Higashi-Kantō Expressway
		Matsuo Yokoshiba (松尾横芝)		March 30, 1998
		Sanbu Narutō (山武成東)		March 30, 1998
		Tōgane Junction (東金)	Chiba-Tōgane Road; Route 126	March 30, 1998
		Mobara North (茂原北)
		Mobara Chōnan (茂原長南)	Route 409
		Ichihara South (市原南)	Route 297
		Kisarazu (木更津)	Route 410 bypass
		Kisarazu Junction (木更津)	Tokyo Bay Aqua-Line; Tateyama Expressway

External links

• http://www.ktr.mlit.go.jp/honkyoku/road/3kanjo/kenoudo/index.htm