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NEXCO EAST / NEXCO CENTRAL / NEXCO WEST / JB Honshi Expressway / (Public Interest Incorporated Foundation) Japan Road Traffic Information Center Silver Week Period [5 days: September 19, 2026 (Sat) ~ September 23, 2026 (Wed)] Traffic congestion forecast due to concentrated traffic in Expressway (congestion over 10 km)^（※）We will announce it.
To ease congestion, We ask for your cooperation in spreading usage by changing your usage days and time slots.

1. 1. Congestion forecast

Number of traffic jams over 10km

　Total of 279 times for both inbound and outbound lines (September 19th to September 23rd)

• This also includes traffic congestion forecasts due to planned construction restrictions.

Examples of avoiding peak traffic hours

September 22nd (Tuesday): Traffic congestion on the E17 Kan-Etsu Expressway (In-bound) starting near Sakado-Nishi Smart Interchange [maximum 40km]
For example, when traveling from Fujioka Junction to Tsurugashima Interchange on Kan-Etsu Expressway, changing the time of travel can help avoid traffic congestion and shorten the travel time. (See table below)

Traffic congestion forecast information from various companies

Traffic congestion forecast related to the 2026 Kumamoto Earthquake

For details on traffic congestion in the Kyushu region during the Silver Week period, please refer to Attachment 3 [PDF: 835KB].

Traffic congestion forecast due to long-term construction work

Traffic congestion is expected during the Silver Week period due to construction work. Construction information and traffic congestion forecasts can be found on the following website.
　NEXCO CENTRAL
　NEXCO WEST

Prediction of particularly long traffic jams for each company

PA: Parking area, IC: Interchange, TN: Tunnel, BS: Bus stop

• 最大25km以上の渋滞の詳細は別紙1【PDF：218KB】、渋滞を回避する方法については別紙2【PDF：1.6MB】をご確認ください。

Please note that traffic congestion predictions are based on past traffic congestion records and recent traffic conditions, but may differ from actual traffic conditions due to traffic disturbances such as accidents, weather conditions, etc. Check the latest road traffic information before you depart and during your trip. Road traffic information can be found on the following website.

• NEXCO EAST
• NEXCO CENTRAL
• NEXCO WEST
• JB Honshi Expressway
• Japan Road Traffic Information Center

Comparison with past traffic congestion records (for reference)

The following is a comparison of traffic congestion incidents during the Golden Week period in 2026 (this year). Note that the figures include congestion caused by accidents and other factors.

1. The number of traffic jams over 10km includes the number of traffic jams over 30km.
2. The forecast for Silver Week 2026 is based on data collected for the 5-day period from September 19th (Saturday) to September 23rd (Wednesday), 2026.
3. The data for Golden Week 2026 was compiled for the five-day period from Saturday, May 2nd to Wednesday, May 6th, 2026.

2. Key points for alleviating traffic congestion

1. Be careful of slowing down in areas where warnings are issued, such as when In-bound!
2. While driving, please avoid stepping on the brakes unnecessarily and maintain a sufficient following distance!
3. Please refrain from changing lanes during traffic jams as this may cause the congestion to worsen!

3． Please drive safely

We ask for your cooperation in "wearing seat belts in all seats" and "taking frequent and early breaks." Also, on Expressway, there are warning signs for rear-end collisions at the end of traffic jams, so please drive carefully and pay attention to what is ahead. Please also take a look at the following easy-to-understand explanation of safe driving tips.

• https://www.c-nexco.co.jp/safety/safety_drive/pdf/safety.pdf

4. Eliminate wrong-way driving -Expressway are one-way streets -

Driving the wrong way is a dangerous act that can be life-threatening. U-turns and backing up are strictly prohibited. If you hear or see information about wrong-way driving, slow down, keep a sufficient distance, and keep a close eye on the movements of the vehicle ahead. For details, please see below.

• https://www.c-nexco.co.jp/safety/gyakusouboushi/

5. Holiday discounts do not apply during Silver Week.

To avoid increased traffic congestion, holiday discounts will not be applied during this period. Please see below for details.

• https://www.c-nexco.co.jp/topics/2421.html

6. Information regarding Expressway Tour Passes

If you are using Expressway outside of the Silver Week period, please consider using the "Expressway Pass," which allows you to enter and exit Expressway in the designated area for a fixed price within the validity period.
Additionally, we are currently running a campaign where you will receive an extra 15% of the purchase price in ETC Mileage Service points if you use the service only on weekdays.

• Expressway tour pass search site

(Sales exclusion period: September 19th (Sat) - September 23rd (Wed), 2026)