I noticed the Chinese have the same boxes but for mopeds, and they just seem to swam out of no where, and may or may not use those boxes after all.
I find it confusing you want to put something slow and soft in front of something hard and fast moving.
Here we have many bicycle paths for cyclists and 30 kmh mopeds + electric this and that now, and if there are no such path they are supposed to keep alongside the curb, acting like a motorcyclist on a bicycle and say use a left turn lane like they and cars do, well that's totally illegal.
First of all you would have to cross one or more lanes of cars to get out there to the left turn lane, and if you got out there you would be a soft "target" in a world of metal, and as you as a cyclist haven't really learned the traffic code, well then you are just gambling with your life.
We do have a traffic code for cyclists here, but you would be over reaching if you compared it to the traffic code for motorists.
Denmark before traffic code for cyclists,,,,, right of numbers cycling.