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[E19] Nagano Expressway between Omi IC and Koshoku IC
Notice of day and night continuous lane regulation due to tunnel / bridge renewal work

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  • [E19] Notice of day and night continuous lane regulation due to tunnel / bridge renewal work between Nagano Expressway Omi IC ⇒ Koshoku IC
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The latest regulatory information isDraTraPlease see.

PDF version 【PDF: 1.1MB】

July 29, 4th year of Reiwa
East Nippon Expressway Co., Ltd.
Nagano Construction Office

Expressway renewal project logo image image 1

NEXCO EAST At the Nagano Construction Office (Nagano City, Nagano Prefecture), E19 Nagano Expressway (hereinafter referred to as "Nagano Road") Maki (Omi) Interchange (hereinafter referred to as "IC") On the Out-bound line between Koshoku and Sarahani IC, we will implement day and night continuous lane restrictions due to the renewal work of the aging Ipponmatsu Tunnel and the Nakasone River Bridge. 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, although we do not anticipate traffic congestion due to construction regulations, please check the traffic information on websites such as "Expressway Renewal Project Site" and "DraTra" when you go out.
We apologize for any inconvenience this may cause and ask for your understanding and cooperation in the construction.
Regarding the lane restrictions associated with the renewal work of the Nakasone River Bridge, there is no change from the contents announced on July 19, Reiwa 4 [see Appendix [PDF: 1.8MB]].​

1. 1. Overview of lane regulations

Route E19 Nagano Road
section Omi IC ⇒ Koshoku IC Out-bound line
Implementation period Day and night continuous lane regulation
  1. Tunnel renewal work: August 22nd (Monday) to September 16th (Friday), 4th year of Reiwa
  2. Bridge renewal work: August 22nd (Monday) to November 5th (Saturday), 4th year of Reiwa
Time zone 24 hours (all day)
Construction content
  1. Tunnel reinforcement work (see "5. Construction outline (1) Tunnel reinforcement work")
  2. Floor slab replacement work (see "5. Construction outline (2) Bridge floor slab replacement work")

◆Construction image photograph

[Bridge renewal work]
(Photo of Nakasonegawabashi In-bound line construction in the spring of 4th year of Reiwa)

Photograph of the assembly status of the gate type erection machine
Gate type erection machine assembly status
Photograph of new floor slab erection by gate type erection machine
Construction of a new floor slab by a gate-type erection machine

[Tunnel renewal work]
(Photograph of the Ipponmatsu tunnel Out-bound line construction in the spring of 4th year of Reiwa)

Photograph of lining cradle excavation situation
Excavation status of lining cradle
Photograph of lining cradle installation status
Installation status of lining cradle

2. Construction section

Nagano Expressway Omi IC ⇒ Koshoku IC (Out-bound line)

Construction section Nagano Expressway Omi IC ⇒ Image of Koshoku IC (Out-bound line)

3. 3. Lane regulation period

  1. Tunnel renewal construction Out-bound line (Omi IC ⇒ Koshoku IC)
    Regulation period: August 22nd (Monday) -September 16th (Friday) (26 days)
    2. Lane regulation period Tunnel renewal work Out-bound line (Omi IC ⇒ Koshoku IC) image image
    Legend image image
    • Lane restrictions will be enforced on Saturdays and Sundays day and night.
    • The regulation period may change depending on the weather and work progress.
  2. Bridge renewal construction Out-bound line (Omi IC ⇒ Koshoku IC)
    Regulation period: August 22nd (Monday) -November 5th (Saturday) (76 days)
    3. Lane regulation period Bridge renewal work Out-bound line (Omi IC ⇒ Koshoku IC) image image
    • Lane restrictions will be enforced day and night on weekends and holidays.
    • Depending on the weather and work progress, the timing of switching between the overtaking lane and the driving lane and the regulation period may change.

Four. Traffic regulation contents

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

  1. Tunnel renewal construction Out-bound line (Omi IC ⇒ Koshoku IC)
    Regulation extension: Approximately 3.4km
    2. Traffic regulation contents Image image of tunnel renewal work
  2. Bridge renewal construction Out-bound line (Omi IC ⇒ Koshoku IC)
    Regulation extension: Approximately 1.2km
    3. Traffic regulation contents Image image of bridge renewal work

Five. Construction outline

  1. Tunnel reinforcement work
    At the Ipponmatsu Tunnel, which is located between the Nagano Out-bound Omi IC and the Koshoku IC, we will carry out tunnel reinforcement work against uplift and damage to the road surface due to the expansion of the tunnel ground.

    2. [Main construction contents]
    For tunnels where excessive force is applied from the ground, concrete (invert) is installed to improve the stability in order to make the ring-shaped stronger structure. Specifically, after excavating the road surface, we will install an invert to reinforce the bottom of the tunnel, and then carry out pavement work to return it to a road that can be driven. From August to September of Reiwa 4th, as a preliminary step to the installation of the invert, the passages in the tunnel (observer passages, inspection paths) were removed and the concrete (lining cradle) supporting the tunnel wall surface (lining) was installed. I will do it.

    Image image before construction
    Image image after construction
    • Invert is to connect the bottom of the tunnel to the reverse arch with concrete, increase the yield strength and prevent subsidence and deformation.
  2. Bridge floor slab replacement work
    The Nakasonegawa Bridge, located on the Nagano Road Out-bound Line Omi IC ⇒ Sarah IC, is made of concrete due to minute cracks caused by an increase in wheel load due to the increase in vehicle size and salt contained in the antifreeze agent sprayed during the winter. Since the deck has deteriorated and the reinforcing bars have rusted, we will replace it with a more durable prestressed concrete deck.

    3. [Main contents of construction]
    By removing the deteriorated existing concrete deck of Nakasonegawa Bridge and installing a new prestressed concrete deck, we will improve the running performance and safety.

    Image image of bridge floor slab replacement work

6. Request when using

  1. Due to the construction, the number of lanes will be reduced from the current two lanes on each side to one lane because the day and night continuous lanes will be regulated for about 3.4 km and about 1.2 km on the Out-bound line, respectively. Since the lane width is narrow in the day and night continuous lane regulation section, please observe the regulated speed when driving, secure the distance between vehicles, and be careful about rear-end collisions. Also, please be careful when driving as the lane position will change depending on the progress of construction.
  2. Two consecutive day and night lane restrictions will be enforced at intervals of approximately 4km. Please be careful when driving as the lane regulation section is continuous.
  3. Construction vehicles may come and go around the construction site, so please be careful when driving ahead.
  4. Due to traffic concentration during the construction period, the traffic flow may be impaired. Before going out, please check the latest lane regulations and traffic information on the website described in "7. How to obtain traffic information". In addition, please leave plenty of time when using it.
  5. 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.

7. 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

(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.
  • Traffic information is also distributed on Twitter's official account "NEXCO EAST (Kanto)" (@e_nexco_kanto).
  • Information is also distributed on the official LINE account.
LINE ID: @e_nexco_kanto_naga friend additional image image
LINE ID: @e_nexco_kanto_naga
Nagano Expressway Asashi IC ⇔ Koshoku IC Transportation information Two-dimensional code image link to LINE (external link)
Two-dimensional code
Expressway renewal project logo image image 2

Expressway renewal project
Now, safety and security are passed on to the next generation.
NEXCO EAST will work on the renewal and repair business of Expressway in order to deliver safety and security to everyone.
Or search for "high-speed renewal".

　

The NEXCO EAST Group has positioned the period from 2021 to 2025 as "a period that contributes to the achievement of the SDGs and transforms into a new future society," and is making various efforts.
We believe that this "renewal work" initiative will contribute to the SDGs goals No. 8, 9, and 11 as business activities that lead to the development of safe, secure, and reliable infrastructure.

Image image of the SUSTAINABLE DEVELOPMENT GOALS logo and the 8th, 9th, and 11th logos of the SDGs target
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