[E18] Joshin-Etsu Expressway In-bound Line Saku IC ⇒ Usui Karuizawa IC
Notice of change in nighttime traffic closure period due to tunnel renewal construction

The latest regulatory information isDraTraPlease see.

PDF version [PDF: 659KB]

At NEXCO EAST Nagano Construction Office (Nagano City, Nagano Prefecture), the E18 Joshin-Etsu Expressway (hereinafter referred to as ``Joshinetsu Expressway'') In-bound from Saku Interchange (hereinafter referred to as ``IC'') to Usui Karuizawa IC. On the line, we are carrying out renovation work on the aging Akarusan Tunnel. We would like to inform you that the nighttime road closure period related to construction work announced on February 1, 2020 will be changed as follows due to poor weather.

[Changes]

Please note that there is no change to the implementation date of the day and night continuous lane restrictions announced on the same day.
(Reference: Notice of February 1, 2020)

For customers planning to use the applicable sections, please check traffic information on websites such as DraTra, change the time of use, or allow plenty of time when using the service. Masu. This work is necessary to ensure safe and comfortable use Expressway, so we ask for your understanding and cooperation.

1. Construction outline of tunnel reinforcement work

At the Yangaruyama Tunnel located between Saku IC and Usui Karuizawa IC on the Joshinetsu Expressway In-bound Line, we will carry out tunnel reinforcement work to prevent upheavals and damage to the road surface due to expansion of the ground around the tunnel. On Monday, March 18, 2020 and Monday, April 1, 2020, the road will be closed at night due to the assembly and disassembly of excavation equipment.

Main work contents

In order to create a stronger ring-shaped structure for the tunnel, which is subject to excessive force from around the tunnel, concrete (invert) will be installed to improve stability. Specifically, after the road surface is excavated, an invert will be installed to reinforce the tunnel bottom, and then paving work will be carried out to restore the road to a drivable road.

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

Construction image photo (past construction)

2. How to obtain traffic information

(1) Guidance by distribution / posting

• Information on posters, leaflets and digital signage will be posted at nearby tollhouses, SA / PA.
• A banner will be posted on the overpass on the Expressway.

(2) Road traffic information that can be obtained before going out

• Expressway renewal project website
• 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
• NEXCO東日本お客さまセンター
  ナビダイヤル　0570-024-024（24時間オペレーターが対応）
  または　03-5308-2424
• 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
  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
  Wide-area road information is provided in an easy-to-understand manner on the monitor screens installed in SA / PA.

• 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

Reference material

Attachment [PDF: 305KB]