What GP is referring to is Traffic Calming techniques: https://en.wikipedia.org/wiki/Traffic_calming https://en.wikipedia.org/wiki/Traffic_calming Common examp

What GP is referring to is Traffic Calming techniques: https://en.wikipedia.org/wiki/Traffic_calming https://en.wikipedia.org/wiki/Traffic_calming Common example I'm used to seeing is narrowing of the roads and causing a slight bend at various points to essentially 'force' you to slow down. It's not technically causing you to slow, but you feel much more comfortable going slower when transitioning through the calmed area. No speed enforcement needed... just some small changes to the road.