[E18] Joshin-Etsu Expressway Susaka Nagano East IC-Shinshu Nakano IC (upper and lower lines)
Notice of two-way traffic regulation due to bridge renewal construction

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NEXCO EAST Nagano Management Office (Nagano City, Nagano Prefecture)E18 We will implement face-to-face traffic control between the Joshin-Joshin-Etsu Expressway Susaka Nagano East Interchange (hereinafter "IC") and Shinshu Nakano IC (upper and lower lines) due to the renewal work of the aged bridge.

The work to be carried out this time is to replace the reinforced concrete floor slab with a new floor slab on the In-bound line of the Toyosu Viaduct (Toyosu Viaduct) located between the Suzaka Nagano Higashi IC and the Shinshu Nakano IC on the Joshin-Etsu Expressway. We carry out continuous two-way traffic regulation.

During the construction period, congestion and congestion on the Expressway, especially on the last day of the three consecutive holidays in October (peak hours 17:00 to 18:00), it is expected that there will be a maximum of 8 km on the In-bound line and 2 km on the Out-bound line. Will be done. We apologize for any inconvenience caused to customers using the Expressway. During construction Homepage for construction, Or the traffic congestion forecast will be posted on websites such as DraPla so please refer to it when using the Expressway.

This construction is necessary to use the Expressway safely and comfortably, so we kindly ask for your understanding and cooperation.

1 construction section

Joshin-Etsu Expressway Susaka Nagano East IC-Shinshu Nakano IC (upper and lower lines)

* Attached to each line E18 The indications such as indicate the route number (numbering) of Expressway.

2 Regulation period and traffic congestion forecast

(1) Regulatory Period September 19 (Tue) - November 30 (Thu) on 2017 (73 days)

*Construction will continue on day and night even on weekends and holidays.
*The construction period may change depending on the weather and work progress.

(2) Congestion prediction
During the construction period, we anticipate the occurrence of traffic congestion, especially on weekends and holidays. Especially on the last day of the three consecutive holidays (peak hours from 17:00 to 18:00), In-bound to 8km of traffic can be expected on the up line and up to 2km on the Out-bound line.

3 Regulation content

In the floor slab replacement work, we will reduce the section of each two lanes of up and down lanes to one lane and implement face-to-face traffic regulation to concentrate on Out-bound lanes. For the first few days at the start and end of the construction period, overtaking lane restrictions will be imposed on the upper and lower lanes in preparation for switching to two-way traffic regulation.

4 Construction overview

This time, the bridge to replace the floor slab is the Toyosu Viaduct located on the Joshin-Etsu Expressway Susaka Nagano East IC-Shinshu Nakano IC, which is a steel 4-span continuous box girder bridge (261m long) that crosses the first-grade river Yagisawa River and prefectural road. The section of is targeted. 22 years have passed since the Toyosu Viaduct was opened in 1995.

During this period, the concrete cracks and deterioration of the concrete floor slabs and rust on the reinforcing bars were caused by minute cracks caused by the increase in wheel load due to the increase in size of the vehicle and the salt content contained in the antifreeze agent sprayed during the winter season. It is necessary to carry out plate replacement work.

In order to replace the concrete slab part of the bridge is In-bound because there is a need to be closed to traffic the line portion, Out-bound do the work the two-lane line side as a face-to-face way of up and down each one lane.

Main work contents

By replacing the existing deteriorated concrete slab with a new concrete slab, it will be transformed into a safe and comfortable Expressway.

5 How to obtain traffic information

(1) Road traffic information available before going out

(2) Road traffic information available during driving