The latest regulatory information isDraTraPlease see.

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NEXCO EAST Tokorozawa Management Office (Tokorozawa City, Saitama Prefecture) will be closing the ramps at night at the Sayama-Hidaka Interchange (hereinafter referred to as "IC") on the C4 Ken-o Expressway (hereinafter referred to as "Ken-O Ken-O Road") in order to carry out pavement repair work.
We sincerely apologize for any inconvenience this may cause, but we ask for your understanding and cooperation in allowing extra time when you go out.

1. Lamp closure location and date and time

2. Construction overview

Ken-O Road狭山日高ICにおいて、舗装が経年劣化により損傷しているため、舗装補修工事を実施します。この工事を行う区間は1車線のランプであり、工事実施にあたっては通常の車線規制では施工が出来ないことから、ランプを閉鎖して作業を行う必要があります。
Therefore, to minimize inconvenience to our customers, we will close the ramps during the evening hours from Monday to Thursday when traffic volume is low, and carry out the construction work intensively and efficiently. This work is necessary to ensure the safe and comfortable use of Expressway, so we ask for your understanding and cooperation.

3. 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

  https://www.drivetraffic.jp/

  Construction regulation information

  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
  ホームページ　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.
• VICS
  You can get road traffic information with a VICS-compatible car navigation system.

• Information is also distributed through official accounts on X (formerly Twitter) and LINE.
  [X (old Twitter)]
  "NEXCO EAST (Kanto)" (@e_nexco_kanto) Expressway information
  "NEXCO EAST (Kanto Construction Regulations)" (@e_nexco_kanto_k) Decision on implementation of construction restrictions
  [LINE]
  "NEXCO EAST" (@e-nexco) Road closures and weather information