Expressway renewal project
E4Tohoku Expressway Towada IC Tomakosaka IC (up and down line)
~ Efforts to make long-term use of aging Expressway safe ~

Notice image here




Leaflet (surface)

Leaflet (surface)

Leaflet (middle surface)

Leaflet (middle surface)

Why construction is necessary

Expressway renewal project is a drastic repair such as rebuilding a bridge on an Expressway damaged by aging or an increase in large vehicles. Long-term traffic restrictions will occur compared to ordinary construction, but since construction is performed using the latest technology compared to the time of construction, functions can be improved and life can be extended.

Reason why renewal project is necessary

In addition to the age, the severe use environment is causing deterioration. In order to continue to play a role as an aorta supporting the social infrastructure such as economy, society, medical care, disaster prevention, drastic repair is necessary because it can not be improved by repetition of partial repair so far.

Current State of Expressways

Aged deterioration (aging with elapsed years)

As the graph below shows, at the moment there are few roads over 50 years since opening.
The percentage is expected to reach 20% in 2030 and to exceed 70% in 2050.

Expressway transition of the number of years elapsed NEXCO EAST in the tube Expressway number of years elapsed

Severe operating environment (factor of aging)

In addition to aging accompanying elapsed years, the aging of roads is proceeding due to the increase in heavy-duty traffic volume, the increase in total vehicle weight, the spraying of anti-freezing agents, etc.

The increase in the number of large-sized traffic and in the overall weight of traffic
Traffic of overweight vehicles
Spraying of anti-freezing agent

Construction details

Construction section
Regulatory period

Construction section:E4Tohoku Expressway Towada IC-Kosaka IC (up and down line)
Regulatory period: August 19, 2019 (Monday) to November 1, 2019 (Friday)

All day lane regulation (up and down)

All day face-to-face regulation (up and down)

Preparation day

* Work may be postponed in bad weather.
* Face-to-face traffic regulations may change depending on construction progress.

Location map
Image diagram

Deteriorated existing concrete slab deckIs replaced with a new floor slab, and it will be reborn as a Expressway that can be used safely and comfortably. In addition, tunnel flaking countermeasure work and back cavity injection work will be implemented together to improve work efficiency and reduce costs.

※ The deck is a structural member that directly supports a car passing through a bridge and transmits the load to the girder.

Replacement work on the deck

Tunnel repair work

Face-to-face traffic
from now on
Construction schedule

Scheduled renewal work between Ashiro IC and Kasumigaseki IC after 2020

Period and facing traffic regulation enforcement section

  1. From May to July 2020: Approximately 4km between Towada IC and Kosaka IC
  2. From August to October 2020: about 3km between Kosaka IC and Kasumigaseki IC
  3. From May to August 2021 ... Approximately 15km between Ashiro IC and Kazunoha Hachimantai IC
  4. From September to November 2021 ... Approximately 15km between Ashiro IC and Kazunoha Hachimantai IC

* Details will be announced as soon as details are determined.

Traffic regulations

During the renewal work, the two lanes on the upper and lower lanes will be reduced to one lane and consolidated on one side to implement day-to-day traffic restrictions. For the first few days at the start and end of the construction period, all-day lane restrictions on the upper and lower lines will be imposed as preparation work for switching lanes.

We will implement a construction method that can suppress the impact on traffic as much as possible, such as face-to-face traffic regulations that ensure traffic in both directions without stopping traffic.

Face-to-face traffic regulation status

Points to note when using

Since traffic congestion is expected, please go out with plenty of time.

In the traffic regulation section, the maximum speed is limited to 50 km / h.

Please get the traffic information in advance and have some time to spare.

Please cooperate in early lane change before the confluence section.

When traffic jam occurs, please cooperate to prevent rear-end accidents by lighting the hazard lamp at the end and signaling the following car.

Since there are entrance and exit of construction vehicles in the vicinity of the construction site, please keep in mind that you pay attention to the front.

During the construction period, we will provide construction regulation information utilizing road information boards, road signs, easy information boards and call for attention to ensure safe driving. Please check this information when traveling and thank you to travel safely.

Information providing image around the construction site Photo

Road information board
Road sign
Simple information board

※ The picture is the information provision situation inside the Tohoku Regional Head Office .

Contact Information

Inquiries concerning Expressway information

NEXCO EAST Customer Center Navi dial0570-024-024 or 03-5338-7524
We are listening to customers' opinions 24 hours a day, 365 days a year.

Twitter Official Account " NEXCO EAST (Tohoku)"@e_nexco_tohokuEven
We deliver real-time traffic conditions.

Update every 5 minutes / 24 hours OK traffic information dial highway telephone

Mobile phone only dial# 8162(Connect to the nearest region)
※ Highway Telephone notifies you of the latest Expressway traffic information (updated every 5 minutes) for 24 hours.

Inquiry of road traffic information

Japan Road Traffic Information Center nationwide uniform number050-3369-6666
Mobile abbreviated dial (for mobile phones / PHS only) # 8011
Nationwide high-speed dial (auto response only) 050-3369-6700
Road Emergency Dial#9910

Please listen to the highway radio (1620 kHz) for road traffic information while driving.
Also, the SA / PA near youPlease also use Highway Information Terminal.

Notice List