Part of the four-lane Ken-o Expressway is completed

Part of the section between Kuki Shiraoka JCT and Daiei JCT will be completed at 6:00 AM on February 27, 2026.

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Part of the four-lane Ken-o Expressway is completed

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January 16, 2020
East Nippon Expressway Co., Ltd. Kanto Regional Head Office
Tsukuba Construction Office
Ministry of Land, Infrastructure, Transport and Tourism, Kanto Regional Development Bureau
Joso National Highway Office

The construction work has been carried out by the Tsukuba Construction Office East Nippon Expressway Co., Ltd. and the Joso National Highway Office of the Kanto Regional Development Bureau of the Ministry of Land, Infrastructure, Transport and Tourism. C4 We would like to inform you that a portion of the four lanes of Ken-o Expressway (hereinafter referred to as the "Ken-O Road") (from Kuki Shiraoka JCT to Taiei JCT) will begin operation.
We will continue to work on widening the road to four lanes in the Ibaraki and Chiba prefecture sections, with safety as our top priority.

Overview of completed project

Date and time when four lanes will begin operation:
Friday, February 27, 2020, 6:00 p.m.
Section where 4-lane operation begins:
Tsukuba Chuo IC to Tsukuba JCT

Location map of the completed section

Overview of 4-lane operation section

①Before construction of the four-lane road began

Image of the four-lane road before construction began

②As of Friday, January 16, 2026

③After 6:00 on Friday, February 27, 2020

Image of the event after 6:00 AM on Friday, February 27, 2026

Attachment

【C4】圏央道4車線化による効果【PDF：1.6MB】

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