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| Highway Federalism | |
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| 1881 advertisement for a Pope bicycle | |
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| Downtown street at turn of the century, showing widespread bicycle use | |
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| Preaching the gospel of Good Roads, 1893 | |
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| The challenges of early cross-country travel by automobile | |
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| National Highway Users Conference, 1941 | |
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| Highway engineers' rendering of highway bypasses and urban extensions | |
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| Federal Appropriations for Highway Aid, 1916-1953 | |
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| Federal Appropriations for Highway Aid, 1954-1969 | |
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| Denver Meets the Automobile | |
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| Mayor Robert W. Speer, 1904 | |
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| Cherry Creek, before and after renovation | |
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| Denver Tramway strikers, 1920 | |
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| Denver Tramway strike destroyed trolley, 1920 | |
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| Sixteenth Street before paving, ca. 1888 | |
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| Sixteenth Street looking north, with trolleys, horse-drawn traffic, and early automobiles | |
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| Congestion on Sixteenth Street, ca. 1936 | |
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| Busy pedestrian traffic on Sixteenth Street, ca. 1938 | |
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| The Welcome Arch | |
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| The Decentralization of Post-World War II Denver | |
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| Ben Stapleton and Quig Newton | |
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| Denver Planning Office Cartoons, 1952 | |
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| Denver-Boulder Turnpike, tollbooth removal | |
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| Map of Denver metro area | |
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| Denver Population, 1900-1990 | |
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| Stapleton Airport, before the boom | |
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| Aurora, ca. 1950 | |
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| Stapleton Airport and Aurora, with downtown Denver in distance | |
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| Aerial view of Stapleton | |
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| Denver International Airport | |
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| Cinderella City, Englewood, 1968 | |
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| Urban renewal demolishes the Cooper Building, 1970 | |
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| Sixteenth Street after urban renewal, 1979 | |
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| Automobiles and A Small Town | |
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| Bridge over Otter Creek, Middlebury, ca. 1860 | |
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| Middlebury Population, 1850-2000 | |
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| Joseph Battell | |
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| Marble hitching posts on town green, reserved for horses | |
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| Map of major roads converging in Middlebury | |
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| Main Street, Middlebury, ca. 1935 | |
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| Bridges, Bypasses, and Boulevards | |
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| Map of Vermont, indicating interstate and arterial highways | |
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| Bridge and bypass proposal, 1956 | |
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| Map of four different bypass proposals | |
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| Court Street, before widening | |
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| Court Street, after widening, with traffic | |
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| Traffic along Main Street, 2002 | |
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| Traffic backup waiting to enter Middlebury from west, 2002 | |
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| Autocity: Smyrna, Tennessee | |
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| Map of Nashville area, including Smyrna and major highways | |
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| Map of Smyrna, including airport, Nissan factory, major roads | |
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| Smyrna population, 1880-2000 | |
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| Smyrna chronology, 1851-1999 | |