Highways
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Highways
By: Trevor Zalewski
Timeline
1905- Office of Public Roads
1910- Asphalt manufactured from oil-refining byproducts
1913- First highway paved with portland cement
1917- Wisconsin adopts road numbering system
1919- MacDonald appointed head of federal Bureau of Public Roads
1920- Yellow traffic lights
1923- Uniform system of signs
1925- Numbering system for interstate highways
1927- Holland Tunnel
1930s (Late)- Air-entrained concrete introduced
1932- Autobahn opens
1937- Route 66 completed, Golden Gate Bridge
1940- Pennsylvania Turnpike
1944- Federal Aid Highway Act
1949- First concrete pavement constructed using
slipforms
1952- Walk/Don't walk signal, Chesapeake Bay Bridge
1956- New Federal Aid Highway Act,
Lake Pontchartrain
Cause opens
1960s- Reflective paint for highway markings developed
1962- Pavement standards
1964- Chesapeake Bay Bridge- Tunnel opens
1966- Highway Safety Act
1973- Interstate 70 opens west of Denver
1980s and 1990s- Introduction of the open-graded friction course
1986- Fort McHenry Tunnel in Baltimore opens
1987- Sunshine Skyway Bridge completed
1990s- Big Dig begins
1993- Interstate system praised
1993-Glenn Anderson Freeway/Transitway opens
Impact
Negative
Noise
Water Pollution
Habitat destruction/disturbance
Air quality
Climate change from vehicle emission
Positive
Can deliver improved air quality to the areas relieved of a significant amount of traffic
Removal of daily congestion
Eliminate unsafe roads, inefficient routes, traffic jams, and all of the other things that got in the way of "speedy, safe transcontinental travel"