|It's here on Google Maps.|
They're larger than might be obvious from photos (especially photos with no cyclists in them). I measured this one at 10 m long by 3.75 m (32' x 12 '). 3.75 m is of course also the width of this cycle-path.
|A drain built into the gutter prevents|
At normal cycling speeds, you barely notice that you've ridden over a speed-bump like this. If you cycle faster, then you do need to be aware of them.
I've found that 35 km/h is just about uncomfortable over this speed-bump. That's quite typical. I guess at that sort of speed the speed-bump ought to warn me as well as the mopeds about the upcoming road junction (behind the camera).
Note also the separate pedestrian path and the lighting to preserve social safety at night-time. The upcoming tunnel, which gives cyclists a short-cut under the railway line, is always lit.
|Another set of speed-bumps at the junction of two main cycle-paths in Groningen. This is too new to appear on Google Maps, but the older situation can be seen here.|
Often people from outside the Netherlands, as well as those from inside the Netherlands, greatly overestimate the danger posed by bromfietsen - the small mopeds / scooters which are allowed on cycle-paths.
There are two classes of mopeds. The slow ones which can travel at up to 25 km/h (the same speed as an electrically assisted bicycle) and which don't require the rider to wear a helmet and which are allowed on the cycle-paths, and the faster ones which travel at up to 45 km/h, which require helmets and which are allowed only on some rural cycle-paths but not on urban cycle-paths.
Largely, mopeds are ridden by elderly people. However, they're also ridden by some younger people. They're not really fashionable and you'll rarely see them parked outside a school for the higher educational standards. And of course, some of these younger people ride their mopeds irresponsibly or alter them to make them faster. They get pulled up by the police for this quite often.
And their lethality ? Almost certainly less than you think. A Toby Sterling put it, "scooter deaths (amazingly!) were a rounding error." as well as pointing out that you are "more than twice as likely to be murdered in Amsterdam than killed while riding your bike." and that as the US murder rate is four times that of the Netherlands you are "certainly more likely to be murdered while living in the United States than to die while biking in Amsterdam." Note that Amsterdam is not all of the Netherlands, and in fact it's probably one of the more dangerous parts of the Netherlands.
To summarise, you're not actually at any great danger from mopeds even though they are a nuisance and they are disliked by so many people - including Dutch people. Nevertheless, mopeds need some control because this has become a subjective safety issue.