The latest regulatory information isDraTraPlease see.

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NEXCO EAST Saitama Construction Office (Saitama City, Saitama Prefecture), Kazo Management Office (Kazo City, Saitama Prefecture), and Tsukuba Construction Office (Tsukuba City, Ken-O Road Prefecture) will be implementing a night-time road closure on the inner and outer loop of the C4 Ken-o Expressway (hereinafter referred to as the "Ken-O Expressway") between Goka Interchange (hereinafter referred to as the "IC") and Tsukuba Ushiku Interchange to carry out paving work in connection with the widening to four lanes and repair and inspection of road structures.
We apologize for any inconvenience this may cause, and we ask for your understanding and cooperation in allowing yourself plenty of time when heading out.

1. Closed section, date and time

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

2. Detour

For detours, please refer to Appendix 1 [PDF: 1.2MB].
The detour will increase travel time, so please allow yourself plenty of time when traveling.

3. Regarding transit adjustments due to suspension of traffic

For customers who exit Expressway due to a road closure, detour around the closed section, then re-enter and transfer in the forward direction, a "transfer adjustment" will be implemented in which the toll fee will be adjusted according to the section used. (See Appendix 2 [PDF: 741KB])

Transfer IC

< Section I: Tsukuba Chuo IC to Tsukuba Ushiku IC>

1. ETC vehicles only
2. Bando IC is an ETC toll gate only, but vehicles other than ETC vehicles can also use it as a re-entry IC in the event of a road closure. If you are using Bando IC in a vehicle other than ETC, please use the lane marked "support", stop temporarily, and follow the on-site information and instructions of the staff.
3. Joban Expressway ・ ・ ・ Joban Expressway
4. Ushikuami IC is an ETC-only toll gate, but non-ETC vehicles can also use it as an exit IC and re-entry IC when the road is closed. If you are using Ushikuami IC in a non-ETC vehicle, please use the lane marked "support," stop temporarily, and follow the on-site signs and instructions of the staff.

< Section II: Goka IC to Sakai-Furukawa IC>

How to use transit adjustment

ETC customers

• For customers using ETC, please drive wirelessly at designated outflow ICs, and also wirelessly drive at re-inflow ICs. (Transfer certificates are not 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 such as cash

• Customers paying with cash, etc. should receive a "transfer certificate" at the outflow designated IC, then take a "transit ticket" at the re-inflow IC, and then take the "transition certificate" at the toll booth where they pay the toll for the first time. Please hand over your ``book'' and ``traffic ticket.''

Common to ETC and cash customers

• 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　Pavement work (paving, installation of temporary road markings, etc.) and road structure repair and inspection will be conducted between the Goka IC and Tsukuba-Ushiku IC in conjunction with the Ken-O Road 4-lane roadway conversion.
Since the section where these works will be carried out is one lane in each direction and cannot be constructed with normal lane restrictions, it will be necessary to close the section to traffic. Therefore, to avoid inconveniencing customers as much as possible, the road will be closed during weekday evenings when traffic volume is low, so that the work can be carried out intensively and efficiently.
We ask for your understanding and cooperation as this work is necessary for the safe and comfortable use of Expressway by our customers.

• Between Goka IC and Sakai-Furukawa IC, and between Tsukuba Chuo IC and Tsukuba Ushiku IC, lane operation will be changed due to construction work to widen the road to four lanes.
  For details, please refer to Appendix 3 [PDF: 624KB].

Five. How to obtain traffic information

(1) Guidance by distribution / posting

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

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

• NEXCO東日本お客さまセンター（24時間オペレーターが対応）
  ナビダイヤル：0570-024-024
  または：03-5308-2424
• NEXCO EAST Expressway Traffic Information Site "DraTra"
  Real-time information

  [PC] https://www.drivetraffic.jp/

  [Mobile] http://m.drivetraffic.jp/

  Construction regulation information

  [PC] https://www.drivetraffic.jp/construction-regulation
• 日本道路交通情報センター（JARTIC）道路交通情報
  全国共通ダイヤル　050-3369-6666
  （携帯電話短縮ダイヤル　#8011）
  ※全国どこからでも最寄りの情報センターに接続します。
  全国・関東甲信越情報　050-3369-6600
  埼玉情報　050-3369-6611
  茨城情報　050-3369-6608
  千葉情報　050-3369-6612
  【PC】https://www.jartic.or.jp/

(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 official X (formerly Twitter) and LINE accounts.
  [X (old Twitter)]
  "NEXCO EAST (Kanto)" (@e_nexco_kanto) Real-time traffic information
  “NEXCO EAST (Kanto Construction Regulations)” (@e_nexco_kanto_k) Decision to implement construction regulations
  [LINE]
  "NEXCO EAST" (@e-nexco) Road closures and weather information