The latest regulatory information isDraTraPlease see.

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At NEXCO EAST Nagano Construction Office (Nagano City, Nagano Prefecture), from the E18 Joshin-Etsu Expressway (hereinafter "Joshin-etsu Expressway") Out-bound line Matsuida-Myogi interchange (hereinafter "IC") Usui-Karuizawa (light) Karuizawa) In order to reinforce the tunnel in some sections of the IC, lane restrictions will be enforced continuously during the day and night on weekdays.
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. 1. Restricted section and date and time

1. Joshinetsu Expressway Out-bound Line Matsuida-Myogi IC ⇒ Usui-Karuizawa IC

   

2. Date and time
   February 28, 4th year of Reiwa-Friday, April 22nd, 4th year of Reiwa
   • Regulations will be enforced day and night, starting at 6 o'clock on Monday ⇒ will be lifted at 8 o'clock on Friday.
   • The following traffic congestion periods are not regulated.
   • We will inform you of the implementation dates after May, 4th year of Reiwa.
   • In the construction section, it is predicted that it will take longer than usual to pass due to the influence of the regulated speed, so please go out with plenty of time.
   • The regulation period may change depending on the progress of construction work.
   • The dates for implementation until April 4th of Reiwa are as shown in the calendar below.

2. Construction overview

At the Takaiwayama tunnel between the Joshinetsu Expressway down line Matsuida-Myogi IC and Usui-Karuizawa IC, the road surface is uplifted or damaged due to damage to the lower part of the tunnel, so tunnel reinforcement work will be carried out.
Specifically, after excavating the road surface, concrete (invert) will be installed to reinforce the bottom of the tunnel, and then pavement work will be carried out to return it to a road that can be driven. (Please refer to each figure below)
From March to April of Reiwa 4, the passages in the tunnel (watcher passage, audit passage) will be removed as a preliminary step to the installation of the invert.
Since these works take a long time, we will carry out the work while continuously implementing lane restrictions during the day and night.
In addition, we will strengthen the tunnel structure and repair damage to the paved road surface to improve safety. In addition, lane restrictions will not be enforced on weekends and holidays so as not to cause inconvenience to customers as much as possible.
We ask for your understanding and cooperation as this work is necessary to use the expressway safely and comfortably.

[Request when using during construction]

1. If you use this section, please leave plenty of time.
2. There are construction vehicles coming and going around the construction site, so please be careful ahead.
3. Since the driving lane and shoulders are narrow in the regulated section, please observe the regulated speed when driving, secure the distance between vehicles, and be careful about rear-end collisions.
   In addition, lanes will change before and after the restricted section, so please follow the signboards.
4. During the construction period, please check the latest regulatory information and traffic information on road information boards, SA / PA digital signage, and DraTra

■ Regulatory status
The maximum speed is 50km / h in the lane-restricted section. When using, please follow the local signs and drive safely.

■ Main construction contents (installation of invert)
Inverts are installed to improve stability in order to make the ring-shaped stronger structure for tunnels where excessive force is applied from around the tunnel.

• Invert is to integrate the bottom of the tunnel into the reverse arch with concrete, which increases the yield strength and prevents subsidence and deformation.

■ Work image
As shown in the picture below, ①⇒②⇒③⇒④ is partially repeated.

[Removal of guard passage / audit road]

3. How to obtain traffic information

(1) Guidance by distribution / posting

• Information by digital signage will be posted on the surrounding SA / PA.
• 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TEL：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
  群馬情報　050-3369-6610
  長野情報　050-3369-6620
  【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 the official Twitter account.
  "NEXCO EAST (Kanto)" (@e_nexco_kanto) Real-time traffic information

Four. Reference material

Day and night continuous lane regulation <Position map> [PDF: 168KB]