My local training loop takes me by an elementary school. With school starting this week, my town put their portable "Your speed is: xx mph" sign in front of the school.
I was surprised to find it picked me up as I was running against traffic on the other side of the street. I was in the middle of my run, but quickly broke into a sprint to see how high. I only hit 10 before I was passed the range of the radar.
Anyone else break into sprints when they see these things? Enough to hit 12mph?