​The E18 Joshin-Etsu Expressway Out-bound line Matsuida Myogi IC to Usui-Karuizawa IC, which was scheduled to start on June 14th (Monday), will start construction due to unseasonable weather. We will inform you that the date will be changed and it will be implemented from June 21 (Monday).
We apologize for the inconvenience and appreciate your understanding and cooperation.

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The latest regulatory information isDraTraPlease see.

PDF version [PDF: 3.3MB]

NEXCO EAST Saku Management Office (Saku City, Nagano Prefecture), Joshin-Etsu Expressway (hereinafter "Joshin-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
   Attachment-1 [PDF: 287KB]



2. Date and time
   June 14th (Monday), 3rd year of Reiwa-Wednesday, December 20th, 5th 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.
   • Golden Week (about 14 days from late April to early May)
   • Obon (about 14 days in mid-August)
   • Saturdays, Sundays, and holidays, and weekdays between Saturdays and Sundays
   • From December 21st to the end of February of the following year (winter suspension period in this construction)
   • Before and after the traffic congestion period, there will be more traffic than usual and it is expected that it will take some time to pass, so please leave plenty of time.
   • The regulation period may change depending on the progress of construction work.
   • The implementation dates until December 20, 3rd year of Reiwa are as shown in the calendar below.

2. Construction overview

At the Out-bound line, 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, we will install an invert and then carry out pavement work to return it to a road that can be driven. (Refer to each figure on the next page)
Since these constructions 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 order not to cause any inconvenience to customers, lane restrictions will not be enforced on Saturdays, Sundays, holidays, and large holidays (Golden Week, New Year holidays, etc.).
Expressway safely and comfortably, so we ask for your understanding and cooperation.

[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 (Attachment-2 [PDF: 393KB]), please observe the regulated speed when driving, secure the distance between vehicles, and be careful about rear-end collisions. Please give me.
   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 in the lane restricted section is 50km / h. When using it, please follow the local signs and drive safely.

Main construction contents (installation of invert)

For tunnels where excessive force is applied from around the tunnel, inverts are installed to improve stability in order to make the ring-shaped stronger structure.

• Invert is the one that connects the bottom of the tunnel to the reverse arch with concrete to increase the proof stress and prevent the settlement and deformation.

Working image

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

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