Fall protection on height changes (partially over 1.00 m)

A hedge will probably never provide fall protection like a fence. I would just make a proper fence. A temporary solution also takes work and costs money if it is supposed to last for a few years. At the same time, you immediately have an enclosure against dogs, etc. Do you have an impact wrench? If yes, get the concrete screws from Hilti. Order the fence online. Just drill holes and screw in...

The legal aspect plays a subordinate role at first. On the highway, people sometimes drive 160 km/h where 120 km/h is allowed. It's not a problem as long as you don't get caught by a speed camera or something happens. If it weren't for the issue with the insurance and other visitor children, only flower pots would be there.

I have a suitable drill (rotary hammer from Bosch Professional), it makes holes in reinforced concrete like a hot knife through butter
I have also already looked for angle brackets because I believe that simply screwing a double wire mesh fence onto the L-stones (like in your fence picture) is not stable enough.
I was thinking of something like this:




or even the better version:

And what kind of screws do you use?
The concrete screws only go in with an impact driver. Otherwise, "normal" screws with anchors...
One-sided is completely sufficient.

I haven't thought about it that precisely yet... I actually thought of normal screws with anchors. Are concrete screws without anchors more suitable there? Maybe because it's outside? I could also glue it additionally, then it should hold forever.

By one-sided, do you simply mean from above? In my Google research, I found some hints that this is not quite sufficient regarding wind and other stability. One hole more or less doesn't make much more work if you’re already doing it.
Although I would have to mount the side screw or side screws (depending on the attachment) on the sidewalk side and since the L-stones stand directly on the property line, I don’t even know if I’m allowed to do that. Strictly speaking, I think they would no longer be on my property. Then there's also the risk of injury for pedestrians, etc.? ops:

Both screw systems work. Concrete screws are significantly faster. You can also unscrew these a bit and add shims if the post is not plumb...

I made a mistake with the feet. I thought image 3 was a foot that grips the wall from both sides... The ones you showed are the correct ones that are screwed from above and from one side. Just from above is not as stable. Wind is not a problem since you only want to make a low fence and are not attaching any privacy screen.

Yes, the fence must stand on your property. So installation from your side if otherwise you would extend into public space.