Norway's high school graduates should refrain from running naked across bridges and having sex on roundabouts lest they give drivers "too much of a surprise", the national transport regulator said.
Norway's annual post-graduation period called "Russ" lasts weeks, involves partying and drinking heavily - and tends to challenge public morals every spring.
Dozens of accidents involving students' red- or blue-painted vans and buses are reported every year, and sometimes the celebrations lead to crashes killing those aged just 18 or 19.
While the list of rituals involved in the Russ celebrations vary from one school to the next, they almost invariably involve alcohol, nudity and sex.
Norway's annual “Russ” post-graduation period involves lots of #partying, including #nudity on the streets and more, and each year unfortunately also leads to the deaths of teenagers and sometimes other motorists who are shocked at what they see #Dispensary Corner pic.twitter.com/M5jHgUrfUd
— Pharmacy Daily (@pharmacydaily) April 19, 2018
In a statement titled "No to sex on roundabouts", Terje Moe Gustavsen, a former minister of transport who now runs the Public Roads Administration, said: "Everyone understands that being in and around roundabouts is a traffic hazard. It may not be so dangerous for someone to be without clothes on the bridge, but drivers can get too much of a surprise and completely forget that they are driving," he added.