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National Highway 468 No. Ken-o Expressway (Ken-O Road (Ken Odo)) Ami east (Amihigashi) IC ~ Inashiki (Inashiki) IC
[Breaking News] We will inform you of the traffic volume of the newly opened Ken-O Road.

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  • Press Release Kanto Regional Head Office
  • Ken-O Road you about the traffic volume of Amihigashi IC to Inashiki IC.
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March 30, 2009
Ministry of Land, Infrastructure, Transport and Tourism Kanto Regional Development Bureau Joso National Highway Office
East Japan Expressway Co., Ltd. Kanto Regional Head Office Mito Construction Office

Utilization status of the Ken-O Road opened on March 21 (preliminary value)

Ministry of Land, Infrastructure and Transport and NEXCO EAST has been promoting the development Ken-O Road of up to Inashiki interchange from Ami east interchange section, extended 6km was opened on March 21.

The traffic volume immediately after opening is as follows.

Saturday, March 21 1,900 units (opening date: 9 hours traffic):Sunny
March 22 (Sun) 2,900 vehicles (24-hour traffic volume): Cloudy
Monday, March 23 1,900 units (24-hour traffic volume):Sunny
Tuesday, March 24 2,100 (24-hour traffic volume): Cloudy
Wednesday, March 25 2,200 (24-hour traffic volume): Cloudy
Thursday, March 26 2,400 (24-hour traffic volume):Sunny
March 27 (Friday) 2,400 (24-hour traffic volume):Sunny

The traffic conditions on the surrounding general roads due to the opening are under investigation. We will inform you about the survey results at a later date.

Expected to reduce accessibility time and improve accessibility to Narita Airport

  • Comparing the time required from Tsukuba City Hall to Narita Airport with using Route 408, About 20 minutes (It will be shortened from about 100 minutes to about 80 minutes).

Improve accessibility to Expressway from the southern area of the prefecture

  • Improves accessibility to the Expressway from Inashiki City and Route 408.

1) Overview of the section opened this time

・Route name
National Route 468 Ken-o Expressway (Ken-O Road)
・Open section
6km extension from Amihigashi IC to Inashiki IC
・Opening IC
[Connecting road]
Inashiki IC (Numata, Inashiki City)

[Major local road Edozaki Shintone Line Bypass]

  • Amihigashi IC was opened to the Tsukuba JCT area in March 2007, but with the opening this time, it is now possible to use the Inashiki IC area.
Opening on March 29, 2003: 1.5km from Tsukuba JCT to Tsukuba Ushiku IC, March 10th, 2007: 12km from Tsukuba Ushiku to Amitou IC, opening on March 21, 2009: Image of 6km extension from Amihigashi IC to Inashiki IC

2) Maintenance effect

・Expected to reduce accessibility to Narita Airport and improve accessibility
Ken-O Road was opened to Inashiki IC of the time required from Tsukuba city hall to Narita, compared to use Route 408, about 20 minutes shorter (408 No. utilizing 100 minutes national road ⇒ Ken-O Road utilized 80 minutes) It is expected that the convenience for Tsukuba and Narita will be improved.

Opening on March 21, 2009: Image of 6km extension from Amito IC to Inashiki IC
[Route Information] 1. Tsukuba City Hall → National Route 408 → Narita Airport (100 minutes) 2. Tsukuba City Hall → Joban Expressway Yatabe IC → Amihigashi IC → National Route 408 → Narita Airport (90 minutes) 3. Tsukuba City hall → Joban Expressway Yatabe IC → Inashiki IC → National Route 408 → Narita Airport (80 minutes), 4. Tsukuba City Hall → (tentative name) Tsukuba IC → East Kanto Expressway → Narita Airport (50 minutes) image
  • The time required for general roads is estimated from the 2005 road traffic census general traffic volume survey travel speed during congestion.
  • The time required for the Ken-O Road Expressway is calculated based on the running speed and extension of the provisional form.