Yet Another Rule In Norway
Norway is full of rules. People LOVE here to make rules, and have careers in making rules about rules.
Some rules are .. good, some are strange or plain stupid. And often groups that try to impose a rule on everyone else have issues, and they suffer from lack of something...
While I think there is no harm for riders to wear such reflex-vest, I don't agree that making everyone to wear such gear will reduce motorcycle accidents. If a car driver is sleeping and is not aware of what he is doing on the road - like he first changes lane, then looks if anyone was at the back - vest won't help. Did you look at your rear view and side mirrors?
Looking at that specific photo with those huge blocks on the huge American heavy equipment motorcycles, which take as much space as cars, are you honestly telling me, you can ACCIDENTALLY NOT NOTICE THEM ??? Get off the road & check your eyes before getting back behind the wheel !!!
And this is not to say that smaller bikes or scooters are less visible.
Bike riders are at higher risk that's a given.
But are you trying to protect car driver errors with such rule, or people who should not be driving in the first place?