The Great North Road, the Old Mail Road to Scotland: London to York. Charles G. Harper

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СКАЧАТЬ for road-making, and forestalled both them and Stephenson in adopting fagots as foundations over mires. At that time the ignorant surveyors of roads repaired them with dirt scraped from ditches and water-courses, in which they embedded the first cartloads of stones which came to hand; stone of all kinds and all sizes. This done, their “repairs” were completed, with the result that the roads were frequently as bad as ever and constantly in the most rugged condition. Roads—it may be news to the uninstructed—cannot be made with dirt. In fact, a good road through anything but rock is generally excavated, and the native earth being removed, its place is taken by coarse-broken granite or rock; this in its turn receiving a layer of “macadam,” or smaller broken granite or whinstone, which is finally bound together by a sprinkling of red gravel, of the kind known by builders as “hoggin,” whose binding qualities are caused by a slight natural admixture of clay. In his insistence upon broken stones, Macadam proved a power of observation not possessed by the generality of road-makers, whose method was the haphazard one of strewing any kind upon the road and trusting in the traffic to pack them. With rounded pebbles or gravel stones thus chafing against one another, they never packed into a solid mass, but remained for all time as unstable as a shingly beach. Generations of road-making had not taught wisdom, but Macadam perceived the readiness of the angularities in broken stones to unite and form a homogeneous mass, and in introducing his system proved himself unwittingly a man of science, for science has in these later days discovered that ice is compacted by the action of ice-crystals uniting in exactly this manner.

      A great scheme for laying out the whole of the Great North Road between London and Edinburgh on a scientific basis was in progress when the successful trial of the competing locomotives at Rainhill, near Liverpool, cast a warning shadow over the arrangements, and finally led to the project being entirely abandoned. Had the work been done, it is quite possible that the railways to the north would have taken another direction; that, in fact, instead of land having to be surveyed and purchased for them, the new, straight, and level road would have been given up to and largely used by the railways. Telford was the engineer chosen by the Government to execute this work, of which the portion between Morpeth and Edinburgh was actually constructed. The survey of the road between London, York, and Morpeth was begun as early as 1825, and had been not only completed, but the works on the eve of being started, when the Rainhill trials in 1829 stopped them short, and caused the utter waste of the public money spent in the surveying.

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