roadside safety

WA-RD 425.1
Authors: 
Chris Allaire, Dan Ahner, Manuel Abarca, Paul Adgar, Sarady Long.
Originator: 
Saint Martin's College. Engineering Division.
Publication Date: 
Wednesday, December 4, 1996
WA-RD 580.1
Authors: 
Pius O. Igharo, Eric Munger, Richard W. Glad.
Originator: 
St. Martin’s College.
Publication Date: 
Tuesday, June 1, 2004
WA-RD 638.1
Authors: 
John MIlton, Anna St. Martin.
Originator: 
Washington (State). Dept. of Transportation.
Publication Date: 
Friday, April 1, 2005
WA-RD 662.1
Authors: 
C. Eugene Buth, D. Lance Bullard, Jr., Wanda L. Menges.
Originator: 
Texas Transportation Institute.
Publication Date: 
Saturday, July 1, 2006