http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-2.xsd
Use of graphics and symbols on dynamic message signs
Use of symbols and graphics on dynamic message signs
xi, 179 pages : illustrations (some color) ; 28 cm.
by Brooke R. Ullman, Nada D. Trout, and Conrad L. Dudek.
Performed in cooperation with the Texas Transportation Institute and the Federal Highway Administration
Includes bibliographical references (pages 123-129).