Driver feedback signs are some of the most effective traffic calming products out there. They have virtually no disadvantages and provide lasting results. Other measures, like speed bumps and curb adjustments (bump outs, lane narrowing, etc), oftentimes pose problems to larger vehicles like school buses and emergency response vehicles like fire engines, and also cost municipalities money .
Traffic Calming relies on an ability to safely and effectively slow drivers in areas that may otherwise inadvertently create unsafe driving habits.