Traffic sign retroreflectivity measurement using human observers
Subtitle: final report, Research Project Y 3399, Task 18
By: by Edwin A. Lagergren (Washington State Transportation Center) ; prepared for Washington State Transportation Commission, Department of Transportation, and in cooperation with U.S. Department of Transportation, Federal Highway Administration.
Contributors: McCormack, Edward.; Washington State Transportation Center.; Washington (State). Dept. of Transportation.; United States. Federal Highway Administration.
Publisher: Washington State Dept. of Transportation in cooperation with the U.S. Dept. of Transportation, Federal Highway Administration
Published: 1987
Place of publication: [Olympia, Wash.]
Language: eng
Number of pages: 71
Subjects: Traffic signs and signals.
Notes: "December 22, 1987."

Bibliography: p. 71.
Table of contents: value: Measuring traffic sign reflectivity : a literature survey / by Edward McCormack.