The Boston Globe reports that Sam Balto placed laminated cutouts of the player's face on pedestrian crossing signs outside an elementary school in the city's Roxbury neighborhood on Wednesday.
Balto said he had watched drivers speed through the 20 mph zone for months. The teacher used a speed radar monitor and posted the results on Twitter, clocking drivers at 30 mph to 56 mph.
Crosswalk posts were recently placed in the street near the school, but Balto said drivers would hit them and knock them over.
He placed the Brady images on the posts with the hope that people would slow down. And Balto said it "absolutely" worked.