barrier

WA-RD 642.1
Authors: 
Omar W. Jepperson, William F. Williams, Richard B. Albin.
Originator: 
Washington (State). Dept. of Transportation. Design Office.
Publication Date: 
Monday, November 1, 2004
M 41-01
Originator: 
State Construction Office, Engineering and Regional Operations Division
Publication Date: 
Friday, March 23, 2007