I had the same problem in my old neighborhood. Speed limit was 25, people thought 45 to 60 was appropriate. I put my signs in the middle of the darn road and called the police after I talked to the particular offenders a million times. One was a teen the other was a volunteer fire department guy! A chat with his supervisor solved that problem. I agree, the kids shouldn't be riding in the middle of the road, but people need to be mindful of children in subdivisions...think of the fallout for both the family with a ran over child, and the mental fallout of the person who is the one who hits them. Many lives ruined in a split second.