Transportation Research Board of the National Academies 2007- Transportation research record no. 2008, 2066, 2097, 2162, 2224, 2269, 2288, 2410-2411, 2477-2478, 2547-2548, 2609-2610, v. 2672 (issue 9)

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Transportation Research Board of the National Academies 2007 Transportation research record no. 2006

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Transportation Research Board of the National Academies 2007- Transportation research record no. 2004, 2045, 2116, 2186, 2212, 2310, 2363, 2462, 2511

2007 , 2008 , 2009 , 2010 , 2011 , 2012 , 2013 , 2014 , [2015]

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Transportation Research Board of the National Academies 2007- Transportation research record no. 2001, 2057

2007 , 2008

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Transportation Research Board of the National Academies 2007 Transportation research record no. 1998

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Transportation Research Board of the National Academies 2007- Transportation research record no. 1994, 2077

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Transportation Research Board of the National Academies 2007 Transportation research record no. 1990

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Transportation Research Board of the National Academeis 2007 Transportation research record no. 1993

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Transportation Research Board of the National Academies 2007 Transportation research record no. 1991

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Transportation Research Board of the National Academies 2006- Transportation research record no. 1988, 2027, 2071, 2130, 2173, 2257, 2286, 2395, 2461, 2483, 2553, 2615, v. 2672 (issue 15)

2006 , 2007 , 2008 , 2009 , 2010 , 2011 , 2012 , 2013 , 2014 , [2015] , [2016] , [2017] , 2018

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