 The Royal Commission on London Traffic (1903–05), produced eight volumes of reports on roads, railways and tramways in the London area, including a suggestion for "constructing a circular road about 75 miles in length at a radius of 12 miles from St Paul's".Between 1913 and 1916, a series of conferences took place, bringing all road plans in Greater London together as a single body.Over the next decade, of new roads were constructed, primarily as post-war unemployment relief.