Likewise in North Holland. But most of ours are over roads on cycle paths. And there are veeroosters (sheep gratings) in many places, including the bridge ends. I found, by looking only, that my wheel would fit into one of the slots with ease.
Definitely a no-no, and very unlikely. Until recently, when they opened a couple of new bridges over small canals that "T" into existing paths so that you have to turn one way or another at the junction. Which is just where they put the new grates. What fun.
Cheers...Gary