new 20mph zone is being put into place on Quarryheads Lane and Margery Lane, two roads surrounding Durham School, the latest and last in number of schools across Durham City to be designated ‘Slow to 20’ areas A HEADMASTER has welcomed a new 20mph zone along two roads busy roads surrounding a school. A green light will shine during opening hours at Durham School, when a 20mph speed limit must be adhered to along Durham's Quarryheads Lane and Margery Lane. Once the school day is officially over, no light will show and the speed limit will return to 30mph. The move comes as