http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-2.xsd
supplement to a guide for selecting, designing and locating traffic barriers
A guide for selecting, designing and locating traffic barriers
AASHTO Guide for selecting, locating and designing traffic barriers
American Association of State Highway and Transportation Officials
prepared by Texas Transportation Institute.
"Corrections to the AASHTO Guide for selecting, locating and designing traffic barriers (1977)"--page 1.