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WA-RD 776.1
Authors: 
Charles Roeder, Dawn Lehman.
Originator: 
Washington State Transportation Center (TRAC)
Publication Date: 
Wednesday, June 6, 2012
WA-RD 611.1
Authors: 
David G. Hieber, Jonathan M. Wacker, Marc O. Eberhard, John F. Stanton.
Originator: 
Washington State Transportation Center (TRAC)
Publication Date: 
Thursday, December 1, 2005