There are many factors. Cars are getting safer, streets are getting safer, LED lighting has vastly improved visibility for cars and bikes and pedestrians, and a

There are many factors. Cars are getting safer, streets are getting safer, LED lighting has vastly improved visibility for cars and bikes and pedestrians, and also that Norwegian driver education is very thorough. Drivers ed starts with a 17 hours (2/3 days) theory course, then you are allowed at 16 to start practice driving with parent/other experienced driver in the passenger seat, then you do mandatory hands-on courses on: night driving, cold weather driving, safety driving (on closed track); typically you take at least 5-10 driving lessons on public roads with a certified instructor, then you can take the theoretical exam, and finally the 1-hour driving test before you get your certificate.