Traffic congestion will increase in the USA



Harvard Center for Risk Analysis : scientists
Traffic congestion will increase by more than 30% in 18 U.S. cities by 2030. The biggest increase (54%) will be in Raleigh, North Carolina.
Models for studying the range of trends and impacts — from urban growth to regional migration to the replacement of gas guzzlers with clean hybrids — are becoming increasingly sophisticated, thus giving policy planners in public health and transportation a great chance to invest the necessary resources for improving the quality of transportation.


Harvard Center for Risk Analysis (HCRA) at the School of Public Health, cited by The American Road & Transportation Builders Association, [online] Available: http://www.artba.org/article/new-study-estimates-for-first-time-the-public-health-costs-of-traffic-congestion-in-us/


http://www.wfs.org/content/futurist/january-february-2012-vol-46-no-1/cities-predictions