McAdam, John Loudon

▪ British inventor

born Sept. 21, 1756, Ayr, Ayrshire, Scot.
died Nov. 26, 1836, Moffat, Dumfriesshire
 Scottish inventor of the macadam road (roads and highways) surface.

      In 1770 he went to New York City, entering the countinghouse of a merchant uncle; he returned to Scotland with a considerable fortune in 1783. There he purchased an estate at Sauhrie, Ayrshire. McAdam, who had become a road trustee in his district, noted that the local highways were in poor condition. At his own expense he undertook a series of experiments in road making.

      In 1798 he moved to Falmouth, Cornwall, where he continued his experiments under a government appointment. He recommended that roads should be raised above the adjacent ground for good drainage and covered, first with large rocks, and then with smaller stones, the whole mass to be bound with fine gravel or slag. In 1815, having been appointed surveyor general of the Bristol roads, he put his theories into practice. To document his work, McAdam wrote Remarks on the Present System of Road-Making (1816) and Practical Essay on the Scientific Repair and Preservation of Roads (1819).

      As the result of a parliamentary inquiry in 1823 into the whole question of road making, his views were adopted by the public authorities, and in 1827 he was appointed Surveyor General of Metropolitan Roads in Great Britain. Macadamization of roads did much to facilitate travel and communication. The process was quickly adopted in other countries, notably the United States.

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Universalium. 2010.

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  • McAdam, John Loudon — SUBJECT AREA: Civil engineering, Land transport [br] b. 21 September 1756 Ayr, Ayrshire, Scotland d. 26 November 1836 Moffat, Dumfriesshire, Scotland [br] Scottish road builder, inventor of the macadam road surface. [br] McAdam was the son of one …   Biographical history of technology

  • McAdam, John (Loudon) — (21 sep. 1756, Ayr, Ayrshire, Escocia–26 nov. 1836, Moffat, Dumfriesshire). Inventor escocés del proceso macadán para pavimentar caminos. Hizo temprana fortuna en la oficina de contabilidad de su tío en Nueva York (1770–83). De regreso en Escocia …   Enciclopedia Universal

  • McAdam, John (Loudon) — born Sept. 21, 1756, Ayr, Ayrshire, Scot. died Nov. 26, 1836, Moffat, Dumfriesshire Scottish inventor of the macadam road surface. He made an early fortune in his uncle s New York countinghouse (1770–83). Back in Scotland, he noted the poor… …   Universalium

  • John Loudon McAdam — (* 21. September 1756 in Ayr, Ayrshire, Schottland; † 26. November 1836 in Moffat, Dumfriesshire) war ein schottischer Ingenieur, der 1815 einen damals revolutionären und einfachen Straßenbelag erfand. Dieser diente …   Deutsch Wikipedia

  • John Loudon McAdam — For other people named John McAdam, see John McAdam (disambiguation). John Loudon McAdam Born September 21, 1756 Ayr, Scotland Died November 26, 1836 …   Wikipedia

  • John Loudon McAdam — Retrato de John Loudon McAdam. John Loudon McAdam (21 de septiembre de 1756 en Ayr, Escocia 20 de noviembre de 1836 en Moffat) fue un ingeniero escocés. Dedicó su vida a la construcción de carreteras, área en la que inventó un nuevo proceso que… …   Wikipedia Español

  • John Loudon McAdam — Pour les articles homonymes, voir John McAdam. John Loudon McAdam. John Loudon McAdam est un ingénieur écossais (21 septembre 1756 26 novembre 1836). Curateur des routes en Écosse pui …   Wikipédia en Français

  • John McAdam — John Loudon McAdam John Loudon McAdam (* 21. September 1756 in Ayr, Ayrshire, Schottland; † 26. November 1836 in Moffat, Dumfriesshire) war ein schottischer Ingenieur, der 1815 einen damals revolutionären und einfachen Straßenbelag erfand. Dieser …   Deutsch Wikipedia

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