roads - Road Building History u Roman Roads u Chronology u...

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Unformatted text preview: Road Building History u Roman Roads u Chronology u Thomas Telford u John Loudon McAdam u Layout ROAD BUILDING Roman Roads u First True Road Builders Abbreviated Chronology u Fall of Roman Empire (Early 5th Century) u Act Of Parliament (1555) t Adequate Drainage, Proper Foundation, Cambered Surface, & Impermeable Surface Constructed 372 Major Roads (53,000 Roman Miles) u Roman Roads of Britain - Set Stage For Modern Roads u t Two Men of Each Parish (Surveyor & Orderers) Orderers) u Turnpike Act -England (1663) t No Control Over Routes & Maintenance t 4000 Trusts Responsible For 22,000 Miles (1830s) t Poorly Designed - Lost Roman Technology u l ‘ Ecole ‘Ecole des Ponts et Chaussees (1762) t Train Men To Oversee Construction (Civil Eng. ?) Eng. u Motorways - Limited Access (Motor Vehicles) t First Was 40.5 Miles - Long Island (1914) Thomas Telford John Loudon McAdam u Maps & Surveying u Precise Rules t Round Stones u t 1:40 Gradient t 3-4 Feet Above t Crowned Road Recommended Eminent Domain u Precise Construction u Previously t Gravel u Coarsely Cut Stones u Tested Stone Sizes t Unite By Angles t Fit In Mouth Stone Size Depends On Soil u No Fine Material Added u t Steel Wheels Broke Stones 1 Layout (Middle 19th Century) Grades Limited to 3% Radius of Curves - 164’ u Gutters (1860-1880) u Embanked (1860-1880) u u 2 ...
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