Key Facts
• August 2, 2025: Collision in Kan-Etsu Tunnel halts Kan-Etsu Expressway (downward).
• 1:38 PM: Entry to Kan-Etsu Tunnel (downward) prohibited due to stopped vehicles.
• Route 17’s Futaai Tunnel closed at 2:20 PM after an accident in Yuzawa, Niigata.
• Affected travelers heading to Nagaoka Fireworks Festival shared updates on social media.
Summary
On August 2, 2025, accidents caused significant traffic disruptions near the Niigata-Gunma border. A collision in the Kan-Etsu Tunnel led to the closure of the Kan-Etsu Expressway’s downward lane at 1:38 PM. Similarly, an accident in the Futaai Tunnel on Route 17 resulted in a complete closure by 2:20 PM. Many travelers en route to the Nagaoka Fireworks Festival reported delays and detours on social media.
