When I lived in Amsterdam, the police always had campaigns at the start of winter to enforce bike lights. For a few days, police at major intersections would fi

When I lived in Amsterdam, the police always had campaigns at the start of winter to enforce bike lights. For a few days, police at major intersections would first remind and then fine cyclists who didn't have lights or whose batteries had gone flat over the summer. Very visible and hard to avoid. By the end of that week, nearly everyone was properly illuminated for the winter.