[E18] Joshin-Etsu Expressway In-bound line Saku IC ⇒ Usui Karuizawa IC
All-day lane restrictions due to tunnel renewal work
Notice of change in construction period

The latest regulatory information isDraTraPlease see.

PDF version [PDF: 869KB]

NEXCO EAST At the Nagano Construction Office (Nagano City, Nagano Prefecture), E18 Joshin-Etsu Expressway (hereinafter referred to as "Joshinetsu Road") On the In-bound line between Saku Interchange (hereinafter referred to as "IC") and Usui Karuizawa IC, lane restrictions are in place all day due to the renewal work of the aging Akarusan Tunnel.
The all-day lane restriction period was set to May 8, Reiwa 5 (Monday) ~ October 27, Reiwa 5 (Friday), but since it took time to relocate and remove obstructed objects, we partially revised the construction plan. We would like to inform you that the construction period will be changed accordingly.
We apologize for any inconvenience this may cause, but we ask that you comply with the speed limit within the restricted area and cooperate in driving safely.
In addition, traffic jams of up to about 8 km are expected on holidays during the construction period. Customers who plan to use the target sectors are requested to check the traffic information on websites such as "DraTra", change the usage time zone, and allow plenty of time. This construction is necessary for the safe and comfortable use of the Expressway, so we ask for your understanding and cooperation in the construction.

[Changes]
initially

Change

1. 1. Overview of lane regulations

2. Construction section

Joshin-Etsu Expressway Saku IC ⇒ Usui Karuizawa IC (In-bound line)

3. 3. Lane regulation period

Regulation period: May 8, 2023 (Monday) to December 15, 2023 (Friday) *Excluding some periods

• The calendar from May to August 2023 is omitted.
• It will not be held during the traffic congestion period.
• The regulation period may change depending on the weather and work progress.
  In that case, we will inform you about the regulation schedule after the year-end and New Year holidays and traffic congestion predictions.

Four. Traffic regulation contents

All-day lane regulation of driving lane regulation or overtaking lane regulation will be implemented. When driving, please follow the local signs and drive safely.
Joshinetsu Expressway In-bound Line (Saku IC ⇒ Usui Karuizawa IC)
Regulation extension: about 3.0km

Five. Request when passing special vehicles

Due to this traffic regulation, special vehicles exceeding 3.0 m in width cannot pass during the all-day lane regulation period. Customers using the service, please take a detour to the surrounding roads.
Also, please note that if you have obtained a special vehicle traffic permit ^(*) only for Expressway routes, you will also need to obtain a permit for general roads.

1. 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

We will carry out tunnel reinforcement work to prevent road surface swelling and damage due to the expansion of the ground in the tunnel at the Yakuga Nagareyama Tunnel located between the Joshinetsu In-bound Saku IC and Usui Karuizawa IC.

[Details of main construction]
Concrete (invert) is installed to improve the stability of the tunnel, which is subject to excessive force from around the tunnel, in order to create a stronger ring-shaped structure. Specifically, we will install an invert to reinforce the bottom of the tunnel after excavating the road surface, and then carry out paving work to restore the road to a drivable one. From September to December 2023, we will install concrete (lining support) to support the tunnel wall (lining), excavate the ground, and install an invert.

• What is an invert?...The bottom of the tunnel is joined to the inverted arch by concrete, which increases bearing strength and prevents subsidence and deformation.

Construction image photo (past construction)

7. 7. Request when using

1. Due to the construction work, lane restrictions will be applied all day for about 3.0km on In-bound track, so the current two lanes on each side will be reduced to one. Since the lane width is narrow in the all-day lane regulation section, please observe the speed limit when driving, secure the distance between vehicles, and be careful of rear-end collisions. Also, due to the progress of construction, the lane position will change, so please drive carefully.
2. Construction vehicles may come and go around the construction site, so please be careful when driving ahead.
3. Due to the concentration of traffic during the construction period, there is a risk that the flow of traffic will become worse. Before going out, please check the latest lane regulations and traffic information on the website described in "8. How to obtain traffic information". Also, when using it, please go out with plenty of time.
4. During the construction period, we will use LED information boards and road signs to provide construction regulation information 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 Road 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 the official accounts of X (former Twitter) and LINE.
  [X (old Twitter)]
  "NEXCO EAST (Kanto)" (@e_nexco_kanto) real-time traffic information
  [LINE]
  "NEXCO EAST" (@e-nexco) Road closures and weather information