Factors affecting sign retroreflectivity
By: by Alan R. Kirk, Elizabeth A. Hunt and Eric W. Brooks.
Contributors: Hunt, Elizabeth A.; Brooks, Eric W.; Oregon. Dept. of Transportation. Research Group.
Publisher: Oregon Dept. of Transportation, Research Group
Published: 2001
Place of publication: Salem, OR
Language: eng
Number of pages: 19
Subjects: Street signs -- Oregon.; Reflectance.
Notes: "January 2001."

"Report No. OR-RD-01-09"--Documentation page.

"Contract or Grant No. SR 514"--Documentation page.

Includes bibliographical references (p. 19).