There are distinct red paved bike paths separated by a curb, separating them from cars & pedestrians.
The one I used had foot brakes and because of its weight it was difficult for to get on or off.
Few have gears and because The Netherlands are so flat, one doesn't need them anyway.
No one, I repeat no one wears a helmet.
Most of the Dutch people I saw were very fit. Obesity seems not exist here.