Patterned pavement markings with upright retroreflectors

Details Patterned pavement markings with upright retroreflectors Patterned pavement markings with upright retroreflectors

1996-04-18

1997-09-23

Davis, Jenna

Stock material or miscellaneous articles

Two dimensionally sectional layer

Next to unitary web or sheet of equal or greater extent

428 51, 428168, 428169, 428343, 428354, 428906, C09J 702

Patent

active

056702272

ABSTRACT:
An improved pavement marking sheet material, and a method for making such pavement marking sheet material. The pavement marking sheet material comprises a selected configuration of upright retroreflectors. The upright retroreflectors are arranged in a selected configuration so as to maximize reflectivity as measured at actual observation geometries by allowing light to be incident to effective portions of the retroreflective elements on the upright retroreflectors.

REFERENCES:
patent: 3758192 (1973-09-01), Bingham
patent: 4035059 (1977-07-01), DeMaster
patent: 4388359 (1983-06-01), Ethen et al.
patent: 4490432 (1984-12-01), Jordan
patent: 4564556 (1986-01-01), Lange
patent: 4988541 (1991-01-01), Hedblom
patent: 4988555 (1991-01-01), Hedblom
patent: 5053253 (1991-10-01), Haenggi et al.
patent: 5127184 (1992-07-01), Wong
patent: 5227221 (1993-07-01), Hedblom
Transportation Research Record No. 1409, "Correlation of the Nighttime Visibility of Pavement Marking Tapes With Photometric Measurement," National Academy Press, Washington, D.C., 1993.
ASTM D 4061-89, Standard Test Method for Retroreflectance of Horizontal Coatings.
ASTM E 808-91, Standard Practice for Describing Retroreflection.

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