One such intervention is the installation of speed bumps, which are small raised areas designed to slow vehicles to about 15-20 miles per hour. Another form of intervention is sobriety check points, which are often found at intersections.
These programs may not only raise awareness of traffic safety issues, but they also may improve knowledge of the different types of traffic signs. However, more research is needed to determine the effectiveness of these initiatives. Various enforcement interventions have been shown to be effective.