[E18] Joshin-Etsu Expressway Out-bound Line Matsuida Myogi IC ⇒ Usui Karuizawa IC
Notice of day and night continuous lane restrictions due to tunnel renewal construction

The latest regulatory information isDraTraPlease see.

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　NEXCO東日本　長野工事事務所（長野県長野市）では、E18上信越自動車道（以下「上信越道」）下り線　松井田妙義（まついだみょうぎ）インターチェンジ（以下「IC」）から碓氷軽井沢（うすいかるいざわ）IC間において老朽化した高岩山（たかいわやま）トンネルのリニューアル工事に伴う昼夜連続車線規制を実施します。お客さまにはご迷惑をおかけしますが、規制区間内では速度制限を遵守いただき、安全運転にご協力をお願いします。
　なお、車線規制により平日昼間に最大3km前後の渋滞の発生を予測しております。対象区間のご利用を予定されているお客さまにおかれましては、「ドラとら」などのWEBサイトで交通情報をご確認いただくほか、ご利用時間帯の変更や時間に余裕を持ったご利用をお願いします。安全・快適に高速道路をご利用いただくために必要な工事ですので、工事へのご理解とご協力をお願いします。

1. 1. Overview of lane regulations

◆Construction image photo (past year's construction)

2. Construction section

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

3. About lane restriction period

• The restrictions will start at 6am on Monday morning and will be lifted by 8pm on Friday night.
• During the construction period, we predict that traffic congestion of up to 3 km will occur during the daytime on weekdays.
• The regulation period may change depending on the weather and work progress.
• We will notify you separately regarding the restriction period after the August peak season.
• Actual traffic conditions may differ from predictions due to accidents or weather conditions, so please check the latest traffic information before departing.

Four. Lane regulation contents

We will implement day and night continuous lane restrictions. When driving, please follow the local signs and drive safely.

• Out-bound line Matsuida Myogi IC ⇒ Usui Karuizawa IC
• Regulation extension: Approximately 3.0km

Five. Request when passing special vehicles

Due to the latest traffic regulations, special vehicles over 3.0m in width will not be allowed to pass during the day and night continuous lane regulation period. For those using the service, please take a detour to nearby roads.
Also, please note that if special vehicle permission ^(*) has been obtained only for Expressway, you will also need to obtain permission for general roads.

• What is special vehicle passage permission?
  Based on the Road Law and the Vehicle Restriction Ordinance, this is a permit required for special vehicles that exceed general restrictions (length, weight, vehicle width, etc.) to pass on public roads.

6. Outline of tunnel reinforcement work

At the Takaiwayama Tunnel between Matsuida Myogi IC and Usui Karuizawa IC on the Joshinetsu Out-bound Outbound Line, tunnel reinforcement work will be carried out to prevent the road surface from swelling and damage due to expansion of the tunnel ground.

【主な工事の内容】
　地山から過度な力がかかっているトンネルに対して、リング状のより強い構造にするため、インバートを設置し、安定性を向上させます。具体的には、路面掘削後にトンネル底面を補強するコンクリート（インバート）の設置を行い、その後走行可能な道路に戻すための舗装工事を実施します。令和6年2月～7月は、インバートの設置を行います。

• 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.

7. 7. Request when using

1. Since the construction section will be subject to continuous day and night lane restrictions over a Out-bound line of approximately 3.0km, the number of lanes will be reduced from the current two lanes on each side to one lane. Since the lane width is narrow in the day and night continuous lane regulation section, please observe the regulated speed when driving, secure the inter-vehicle distance, and be careful about rear-end collisions. In addition, the lane position will change depending on the progress of construction, so please be careful when passing.
2. Vehicles for construction work may enter and leave the area around the construction site, so please be careful when traveling ahead.
3. During the construction period, traffic flow may be affected due to heavy traffic. Before heading out, please check the latest lane regulations and traffic information on the websites listed in "8. How to obtain traffic information." Also, please leave plenty of time when using the service.
4. During the construction period, we will provide construction regulation information using LED information boards and road signs and call attention to driving safely. Please check this information before driving and drive safely.

8. How to get 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 "Dora Tora"
  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
  群馬情報　050-3369-6610
  【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
  [LINE]
  “NEXCO EAST” (@e-nexco) Road closures and weather information