Ours is posted at 25 mph....although the young adult and his friends (older than teenagers, early 20s) think it is at least 40. One of these days I will be taking that issue up with the police department as he drives much to fast for our street. Ironically, a lot of our neighbors have "mentioned" it to me because they know I won't just sit back. This driver also must suspect I'm on to him because now if I'm out front, he'll purposely slow down in front of my home and wave to me.
In the meantime, I will keep my children even closer to me to make sure they are safe.