In Canada, a well-built dry stone wall along a busy residential street can often act as a kind of 'aesthetic speed bump' and be a calming antithesis to the frenzy of traffic activity wizzing past. Where an ordinary speed bump only barely slows down traffic to a safe speed at the actual buMp, a good looking wall gives a visual signal, along its entire length, to slow down, inviting drivers to enjoy a safe drive, while keeping the car's suspension from getting wrecked, and also helping maintain a delightful suspension of disbelief.
