Standard Test Method for Measurement of Nighttime Chromaticity of Pavement Marking Materials Using a Portable Retroreflection Colorimeter

Importancia y uso:

5.1 The chromaticity of the stripe is determined by means of the tristimulus values X, Y and Z for the CIE 1931 (2°) standard observer for CIE standard illuminant A, which are converted to the chromaticity coordinates (x, y) and shown in the CIE 1931 (x, y)-chromaticity diagram. Refer to Practice E308.

5.2 Under the same conditions of illumination and viewing, the chromaticity coordinates (x, y) represent the nighttime color of pavement markings in vehicle headlamp illumination as seen by drivers of the vehicles.

5.3 The chromaticity of pavement (road) markings may change with traffic wear and require periodic measurement to ensure that the chromaticity is maintained within boundaries (see Specification D6628 for examples of color boundaries).

5.4 As specified by CEN EN 1436 and Test Method E1710, the measurement geometry of the instrument is based on a viewing distance of 30 m, a headlamp mounting height of 0.65 m and an eye height of 1.2 m.

5.5 It shall be the responsibility of the user to employ an instrument having the specified observation and entrance angles.

Subcomité:

E12.10

Referida por:

D6628-23, D8584-24, D2205-20, D0713-23

Volúmen:

06.01

Número ICS:

17.180.20 (Colours and measurement of light), 93.080.30 (Road equipment and installations)

Palabras clave:

chromaticity; pavement; pavement markings; portable retroreflection colorimeters; reflection;