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Sustainable Streets Index

With New York's fleet of more than 13,000 taxi cabs transmitting Global Positioning System (GPS) data, the city's Department of Transportation has been able to develop a highly detailed picture of traffic patterns in the Big Apple.
Aug 20, 2012   The Wall Street Journal
New York City's second annual Sustainable Streets Index adds a wealth of data in support of green transportation and street safety.
Mar 26, 2010   Streetsblog