"Recession Reduces Gridlock" Congestion Data for U.S. Urban Areas
As unemployment goes up in 2007 through 2009, vehicle miles traveled go down. In LA-Long Beach CA, for instance, the 4,030 freeway miles per person are 3,683 by 2009, less than a 10% decrease. However, during the same period, the annual hours of delay per auto commuter go from 82 to 63, nearly a 25% decrease. The removal of relatively few vehicles from the road leads to free flowing traffic and less congestion. SILVER LINING (admittedly small): decrease in congestion as fewer people drive
*9 variables to explore
*29 urban areas to study
*Year range: 2004-2009
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These discussions suggests a simple study of the data. Select different variables and manipulate the parameters to further examine and analyze the data. Please Share your Comments, Analysis, and Conclusion
The chart shows how the increasing number of hours spent in cars leads to increasing delays as well as fuel wasted (at a greater than 45 degree slope). The cost runs to billions of dollars and hundreds of billions of hours annually. The problem is particularly acute in large urban areas. The chart also shows the New York/New Jersey area, with far greater public transit use, expending significantly less money and time than more car dependent areas.
*14 variables related to Smart Growth and transportation policy from TTI data
*101 urban areas
NOTE: charted values for NY-NJ, New York-Newark - Public Trans.Annual Passenger-miles (million) equal HALF the actual value.
Please Share your Comments, Analysis, and Conclusion
Citation: SSPP Featured Datasets. 2011. Congestion Data for U.S. Urban Areas. Sustainability: Science, Practice, & Policy