NEXCO EAST Kanto Regional Head Office (Taito-ku, Tokyo) will carry out tunnel repair work for the Nagano area between Usui Karuizawa Interchange (IC) and Saku IC on the Joshin-Etsu Expressway (Joshinetsu Expressway) (Out-bound line).

This work required repair work due to damage to the lower part of the tunnel and part of the pavement surface ( Attachment 1 [PDF: 166KB] ).

Since it is necessary to enforce traffic restrictions to reduce the number of lanes during the construction day and night, including Saturdays and Sundays, it is estimated that construction congestion will be up to 5km during heavy traffic hours such as weekends and mornings.

We apologize for the inconvenience to our customers, but when you go out, please allow time and when you go to Karuizawa on Saturdays and Sundays, to avoid traffic congestion at the Usui Karuizawa IC We recommend using IC.

For road traffic information, please visit NEXCO EAST Customer Center, Japan Road Traffic Information Center, etc. For details, see 2. (2).

1 Regulation points/period and traffic congestion prediction, etc.

(1) Regulation points

(2) Regulation period and traffic jam prediction

During the construction period, the number of lanes that can be driven will decrease from 2 lanes to 1 lane, so traffic congestion of about 5 km is expected on weekends. When going to Karuizawa, we recommend using Matsuida Myogi IC to avoid traffic congestion at the Usui Karuizawa IC.

We will guide you through detours including general roads, so please consider the route to be used with reference to road traffic information etc. ( Attachment 2 [PDF: 159KB] ).

Please note that we will not adjust the charges even if you make a detour.

2 How to obtain road traffic information

(1) Day/night lane regulation posters, leaflets, etc.

(2) Road traffic information that can be obtained before going out

(3) Road traffic information available while driving