ASTM D4383-21 PDF Download

ASTM D4383-21 is a standard specification that outlines the requirements for plowable, retroreflective, raised pavement markers used for lane marking and delineation. These markers are designed to provide visibility at nighttime, even under wet conditions. The standard covers different types of markers, including type A, type B, and type E.

The markers are available in various colors, including white, yellow, red, blue, and green, to meet different applications. Two mounting options are considered: markers to be mounted in a holder and markers to be mounted in a recess.

The specification provides detailed construction requirements for retroreflective markers, including testing for coefficient of luminous intensity, abrasion resistance, compressive strength, impact strength, and holder ramp hardness.

It's important to note that the standard includes explanatory notes and footnotes, which are not considered as requirements of the standard except for those in tables and figures.