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[C4] Between the Mobara Chonan IC and Kisarazu East IC on the Ken-O Ken-o Expressway
Notice of nighttime closure

June 14th (Monday) -June 25th (Friday) From 21:00 pm to 5:00 the next morning
-We will install wire ropes and repair and inspect road structures-

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  • [C4] Notice of nighttime closure between Mobara-Chonan IC and Kisarazu-higashi IC on the Ken-O Ken-o Expressway
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The latest regulatory information isDraTraPlease see.

PDF version [PDF: 2.7MB]

May 31, 3rd year of Reiwa
East Nippon Expressway Co., Ltd.
Tokyo Wan Aqua-Line Expressway Management Office

NEXCO EAST Tokyo Wan Aqua-Line Expressway Management Office (Kisarazu City, Chiba Prefecture), from the C4 Ken-o Expressway (hereinafter "Ken-O Road Expressway") Mobara Chonan Interchange (hereinafter "IC") to Kisarazu East We will close the road at night to install wire ropes and repair and inspect road structures at the IC.
We apologize for the inconvenience caused to our customers, but we ask for your understanding and cooperation so that you will have time to spare when you go out.

1. Closed section and date and time

(1) Closed section
　Section Ⅰ Ken-O Road within the outer loop Mobara Chonan IC ~ Ichihara Tsurumai IC
　Section Ⅱ Ken-O Road within the outer loop Ichihara Tsurumai IC ~ Kisarazu Higashi IC

Image image of closed section
  • Attached to each line C4 The indications such as indicate the route number (numbering) of Expressway.

(2) Date and time

Section I
Implementation date:
June 14th (Monday) -June 25th (Friday), 3rd year of Reiwa
[Excluding Saturdays and Sundays] Every day from 21:00 to 5:00 the next morning
Preparation day:
June 28th (Monday) -July 9th (Friday), 3rd year of Reiwa
[Excluding Saturdays and Sundays] Every day from 21:00 to 5:00 the next morning
Section II
Implementation date:
June 14th (Monday) -June 18th (Friday), 3rd year of Reiwa
Every day from 21:00 to 5am the next morning
Preparation day:
June 21st (Monday) -June 25th (Friday), 3rd year of Reiwa
Every day from 21:00 to 5am the next morning
Image of closed days
Two-dimensional code image link to NEXCO EAST (Kanto construction regulations) twitter (external link)
  • Break facilities within the closed section will be closed as follows.
    Ken-O Road O Expressway 20:30 pm to 5:00 the next morning
  • In stormy weather, it will be postponed to the spare day.
  • Construction decision will be announced on Twitter, etc. around 17:00 in the evening.

2. Detour

Please refer to Attachment-1 [PDF: 474KB] for the detour.
The detour will take longer, so please leave plenty of time.

3. Regarding transit adjustments due to suspension of traffic

For customers who temporarily flow out of the Expressway due to traffic closure, bypass the closed section, re-inflow and transfer in the forward direction, we will implement "transfer adjustment" to adjust the toll according to the section used. I will. (See Attachment-2 [PDF: 963KB])

Transfer designated IC

Closed place Outflow designation IC Re-inflow designated IC
[Ken-O Road] (Inner loop)
Kisarazu East IC ⇒ Mobara Chonan IC
(From Kawasaki to Togane)		 [Ken-O Road] (Inner loop)
Kisarazu East IC
[Tateyama Expressway]
(In-bound line) Kimitsu IC
(Out-bound line) Kisarazu Kita IC,
Kisarazu Minami IC
[Tokyo Wan Aqua-Line Expressway Access Road]
(Out-bound line) Sodegaura IC		 [Ken-O Road] (Inner loop)
Mobara Chonan IC, Mobara Chonan SIC (*),
Mobara Kita IC, Oamishirasato SIC (*),
Togane IC
[Chiba-Togane Road] (In-bound Line)
Togane IC
[Ken-O Road] (Outside)
Mobara Chonan IC ⇒ Kisarazu East IC
(From Togane to Kawasaki)		 [Ken-O Road] (Outside)
Mobara Chonan IC,
Mobara Nagara SIC (*), Mobara Kita IC		 [Ken-O Road] (Outside)
Kisarazu East IC
[Tateyama Expressway]
(In-bound line) Kisarazu Kita IC,
Anesaki Sodegaura IC, Kisarazu Minami IC
(Out-bound line) Kimitsu IC, Futtsu Chuo IC
[Tokyo Wan Aqua-Line Expressway Access Road]
(In-bound line) Sodegaura IC
[Ken-O Road] (Inner loop)
Ichihara Tsurumai IC ⇒ Mobara Chonan IC
(From Kawasaki to Togane)		 [Ken-O Road] (Inner loop)
Ichihara Tsurumai IC, Kisarazu Higashi IC		 [Ken-O Road] (Inner loop)
Mobara Chonan IC, Mobara Chonan SIC (*),
Mobara Kita IC, Oamishirasato SIC (*),
Togane IC
[Chiba-Togane Road]
(In-bound line) Togane IC
[Ken-O Road] (Outside)
Mobara Chonan IC ⇒ Ichihara Tsurumai IC
(From Togane to Kawasaki)		 [Ken-O Road] (Outside)
Mobara Chonan IC,
Mobara Nagara SIC (*), Mobara Kita IC		 [Ken-O Road] (Outside)
Ichihara Tsurumai IC, Kisarazu Higashi IC
[Tateyama Expressway]
(In-bound line) Kisarazu Kita IC
(Out-bound line) Kisarazu Minami IC, Kimitsu IC
[Tokyo Wan Aqua-Line Expressway Access Road]
(In-bound line) Sodegaura IC

* Mobara Nagara SIC and Oamishirasato SIC can only be used on ETC vehicles.

How to use transit adjustment

<< ETC customers >>

  • Customers using ETC are requested to run the outflow designated IC wirelessly and the re-inflow designated IC wirelessly. (No transit certificate will be issued for ETC vehicles)
  • ETC time zone discount will be applied, considering the transited journey as one.
    Toll charges are adjusted at the time of billing, so they may differ from those displayed at the toll gate.
  • Insert the same ETC card for all journeys and pass through the ETC lane at the tollgate.

<< Customers for cash, etc. >>

  • Customers who pay by cash, etc. should receive the "passage certificate" at the outflow designated IC, and then get the "passport" at the re-inflow designated IC, and then make the "transfer" at the toll booth that pays the fare first. Please give us your "certificate" and "passport".

《Common to customers such as ETC and cash》

  • If the suspension of traffic is released after the outflow designated IC is released, the fare will be adjusted even if it is re-introduced from the IC (including the outflow designated IC) in the closed road section in the forward direction.

Four. Construction overview

Ken-O Road Between Mobara-Chonan IC and Kisarazu-higashi IC, we will carry out wire rope installation work and repair / inspection of road structures to prevent head-on collision accidents in the provisional two-lane section.
This section is a two-lane section (one lane on each side), and it is difficult to secure a lane for vehicles when carrying out construction work. We will carry out the construction intensively and efficiently.
This work is necessary to use Expressway safely and comfortably, so we ask for your understanding and cooperation.

Photograph of wire rope installation example Image of caption of wire rope installation example
Photograph of road structure inspection work status Image of caption of road structure inspection work status

Five. How to obtain traffic information

(1) Guidance by distribution / posting

  • Notice signs, posters and leaflets will be posted at rest facilities around the area.
  • A banner will be posted on the overpass on the Expressway.

(2) Road traffic information that can be obtained before going out

(3) Road traffic information available while using the Expressway

  • Road information board
  • Highway radio (AM1620kHz)
    The highway radio section is indicated by signs on the Expressway.
  • Highway Information Terminal
    We will inform you of road information in an easy-to-understand manner by the monitor screens installed in SA / PA.
  • VICS
    You can get road traffic information with VICS-compatible car navigation and other on-board devices.
  • Information is also distributed on the official Twitter account.
    " NEXCO EAST (Kanto)" (@e_nexco_kanto) Real-time traffic information
    " NEXCO EAST (Kanto construction regulations)" (@e_nexco_kanto_k) Judgment regarding implementation of construction regulations
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