The difficulty with changing behavior, particularly children's behavior, makes environmental modification particularly attractive. Changes in the traffic environment have been a traditional component of pedestrian safety programs for many years. For speed bumps, they calculated that for every 1 cm increase in the height of the bump, there is a 1 km reduction in speed. No separate data for children.
Data appear to be reliable since they are based on police reports.
Intervention was equally effective whether or not pedestrian-activated flashing light was used. Effects were maintained one month and one year later. Reduction in speed Reduction in traffic volume. Police reported MV collisions and collisions with injuries. Signs only did not reduce speed.