When i drive, i don't have time try to see, what number write on this small icon. All i need is hearing about it. Look at my screenshot: here 6 speed alerts and minimum 4 of they is wrong (we don't have official speed restriction ending on 5, only 5 itself). How i notice, the same thing happens everywhere. I don't believe in they value, BUT i must be alerted like "somthing dangerous around here. Be ready!". On my opinion enough only three alert icon: camera, mobile camera and speed restriction (60 in the circle). Other one must be small to clearness the map.