The latest regulatory information isDraTraPlease see.

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NEXCO EAST Niigata Regional Head Office (Chuo-ku, Niigata City) will be located between the E8 Hokuriku Expressway Kakizaki Kakizaki Interchange (IC) and the Yoneyama Yoneyama IC from May 9th (Monday) to November 29th (Tuesday), 4th year of Reiwa. Until then, the Yoneyama Tunnel invert installation work (renewal work) is being carried out. From June 1, 4th (Wednesday), Reiwa has been implementing all-day lane restrictions by two-way traffic on the upper and lower lines.
Since it is necessary to install inverts continuously and regulations will be applied including the summer traffic congestion period, congestion is predicted on the Nagaoka Fireworks Festival date and Obon period near the construction site between Kakizaki IC and Yoneyama IC on the Hokuriku Expressway. I am.
We are pleased to inform you that we have revised the congestion forecast based on the latest traffic trends.
We apologize for the inconvenience, and thank you for your understanding and cooperation.

1. 1. Congestion forecast

Based on the latest traffic trends, we forecast congestion (*) in the following sections and dates and times.

• It is crowded that the flow of cars is bad for 1km.

[Section] Hokuriku Expressway Kakizaki IC ⇔ Yoneyama IC

[Estimated congestion date and time]

2. Construction overview

3. 3. Request to customers

For customers who are planning to use the target section on the date and time when congestion is expected, change the IC to be used, change the traffic time zone / date and time, and use with plenty of time. Thank you for your cooperation in alleviating congestion.
Renewal work is necessary to use the Expressway safely and comfortably. We apologize for the inconvenience and appreciate your understanding and cooperation.

Four. Overview of lane regulations

Between the Hokuriku Expressway Kakizaki IC and the Yoneyama IC, there is a maximum lane regulation of about 6.3km, and the number of lanes that can be driven has been reduced from two lanes on each side to one lane on each side.

Five. About invert installation work to be carried out during lane regulation

Invert construction aims to improve stability by installing an invert to make the tunnel a closed structure and increase the yield strength, prevent deformation such as uplift and subsidence due to board swelling.

Installation of invert (lining part finished in reverse arch on the bottom of the tunnel)

6. Information on road traffic information

• Expressway traffic information service "Drive Traffic (DraTra)"
  It provides real-time road traffic information.
  【address】
  PC / smartphone version https://www.drivetraffic.jp/
  Mobile version https://m.drivetraffic.jp/
• "DraPla", a site full of useful information on Expressway nationwide
  【address】
  PC / smartphone version https://www.driveplaza.com/
  Mobile version https://m.driveplaza.com/
• NEXCO東日本お客さまセンター
  24時間365日オペレーターが応対いたします。
  【電話番号】
  0570-024-024　または　03-5308-2424
• 日本道路交通情報センター（JARTIC）
  【アドレス】
  https://www.jartic.or.jp/
  【電話番号】
  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されます。
• NEXCO EAST Niigata Regional Head Office Twitter (ID: @e_nexco_niigata)
  We send information on traffic jams, road closures, and driving / travel information in Niigata Prefecture.
• Highway radio
  Broadcasting sections are guided by signs on the Expressway.
  Highway radio (AM1620kHz)
• Highway Information Terminal
  Wide-area road traffic information is notified on the monitor screen installed in SA / PA.