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  • "A Toolbox for Alleviating Traffic Congestion." The Institute of Transportation Engineers. 1989.
  • "Introduction of traffic congestion pricing in Seoul, Korea." Asia-Pacific Environmental Innovation Strategies Research. April 29, 2003.
  • "Road Traffic and Air Pollution." It's Your Health. Health Canada. May, 2004. http://www.hc-sc.gc.ca/iyh-vsv/alt_formats/cmcd-dcmc/pdf/road_traffic_e.pdf
  • "State of the Air: 2007." American Lung Association. http://lungaction.org/reports/sota07_cities.html
  • "Traffic pollution - measuring the real damage." Physorg.com. September 21, 2005. http://www.physorg.com/news6645.html
  • "Traffic pollution 'kills thousands every year.'" CNN.com. September 1, 2000. http://edition.cnn.com/2000/WORLD/europe/09/01/europe.pollution/
  • Albert, Tanya. "Widening Roads Worsens Traffic Congestion." The Cincinnati Enquirer. January 13, 2000. http://www.walkablestreets.com/widen2.htm
  • Arnott, Richard. "Alleviating Traffic Congestion: Alternatives to Road Pricing." Taxation, Resources and Economic Development (TRED) Conference. September, 1994.
  • Beaty, William. "Traffic Waves." http://amasci.com/amateur/traffic/traffic1.html
  • Bowlden, Terry, et al. "Building Better Communities: A Toolkit for Quality Growth." The Quality Growth Coalition. 2000. http://www.agc.org/graphics/pdf_files/bbc/toolkit.pdf
  • City of Los Angeles Demographics - 1990 & 2000 Census http://www.laalmanac.com/LA/la13.htm
  • Malone, Robert. "Worst Cities for Traffic." Forbes.com. http://www.forbes.com/2006/02/06/worst-traffic-nightmares-cx_rm_0207traffic.html
  • Morla, Ricardo. "Vision of Congestion-Free Road Traffic and Cooperating Objects. November, 2005.
  • Poole, Fiona. "Traffic Congestion." House of Commons Library. January 28, 1998.
  • Schrank, David and Lomax, Tim. "The 2007 Urban Mobility Report." Texas Transportation Institute. September, 2007. http://tti.tamu.edu/documents/mobility_report_2007_wappx.pdf
  • Staley, Samuel R. "Do Highways Cause Traffic Congestion?" Reason Foundation. June 29, 2006. http://www.reason.org/phprint.php4
  • Taylor, Brian D. "Rethinking Traffic Congestion." Access. October 1, 2002.