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ROAD BUILDING

ROAD BUILDING. Road Building History. Roman Roads Chronology Thomas Telford John Loudon McAdam Layout. Roman Roads. First True Road Builders Adequate Drainage, Proper Foundation, Cambered Surface, & Impermeable Surface Constructed 372 Major Roads (53,000 Roman Miles)

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ROAD BUILDING

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  1. ROAD BUILDING

  2. Road Building History • Roman Roads • Chronology • Thomas Telford • John Loudon McAdam • Layout

  3. Roman Roads • First True Road Builders • Adequate Drainage, Proper Foundation, Cambered Surface, & Impermeable Surface • Constructed 372 Major Roads (53,000 Roman Miles) • Roman Roads of Britain - Set Stage For Modern Roads

  4. Abbreviated Chronology • Fall of Roman Empire (Early 5th Century) • Act Of Parliament (1555) • Two Men of Each Parish (Surveyor & Orderers) • Turnpike Act -England (1663) • No Control Over Routes & Maintenance • 4000 Trusts Responsible For 22,000 Miles (1830s) • Poorly Designed - Lost Roman Technology • l ‘Ecole des Ponts et Chaussees (1762) • Train Men To Oversee Construction (Civil Eng. ?) • Motorways - Limited Access (Motor Vehicles) • First Was 40.5 Miles - Long Island (1914)

  5. Thomas Telford • Maps & Surveying • Precise Rules • 1:40 Gradient • 3-4 Feet Above • Crowned Road • Recommended Eminent Domain • Precise Construction

  6. John Loudon McAdam • Previously • Round Stones • Gravel • Coarsely Cut Stones • Unite By Angles • Tested Stone Sizes • Fit In Mouth • Stone Size Depends On Soil • No Fine Material Added • Steel Wheels Broke Stones

  7. Layout (Middle 19th Century) • Grades Limited to 3% • Radius of Curves - 164’ • Gutters (1860-1880) • Embanked (1860-1880)

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