Anon12/27/25, 10:14No.2061995
If you're travelling on the Joetsu Shinkansen, and maybe even the regular Joetsu line, expect a lot of traffic for a while, especially around New Years, because there's only 2 paved roads between Gunma and Niigata, and one of those(Kan-etsu Expressway) just got closed due to a huge pileup crash and a fire, and the investigation and cleanup will apparently take weeks if not months.
The other road(National Route 17) only has 1 lane each direction, and has a tunnel that doesn't fit taller coach buses, so you'll be competing for seat reservations with group tours which would otherwise have to make huge detours, either via Nagano through Karuizawa(Route 292 closes for winter so can't do Nagano through Kusatsu) or Ban'etsu Expressway through Koriyama.