The latest regulatory information isDraTraPlease see.

PDF version [PDF: 650KB]

NEXCO EAST Tokorozawa Management Office (Ken-O Road City, Saitama Prefecture) will be closing ramps at night to carry out pavement repair work at Iruma Interchange (hereinafter referred to as "IC") on the C4 Ken-o Expressway (hereinafter referred to as "Ken-O Expressway").
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. 1. Ramp closure location and date and time

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

2. Detour

　迂回にあたっては、別添資料【PDF：528KB】をご参照ください。
　迂回により所要時間が長くなりますので、お時間にゆとりをもってお出かけください。

3. Construction overview

At Ken-O Road Iruma IC, pavement repair work will be carried out due to damage caused by aging. The section in which this work will be carried out is a one-lane ramp, and since the work cannot be carried out under normal lane restrictions, the ramp must be closed to carry out the work.
Therefore, in order to minimize inconvenience to our customers, we will close the ramps at night from Monday to Thursday when traffic volume is low, and carry out the work in a concentrated and efficient manner. This work is necessary to ensure that customers can use Expressway safely and comfortably, so we ask for your understanding and cooperation.

Four. 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.
• On the day of the ramp closing, a detour sign will be installed at the main intersection of the detour.

(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）の道路交通情報
  全国共通ダイヤル　050-3369-6666
  （携帯短縮ダイヤル　#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
  【PC】http://www.jartic.or.jp/

(3) Road traffic information available while driving

• 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 from the monitor screens installed in SA / PA.
• VICS
  You can get road traffic information with a VICS-compatible car navigation system.

• 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