Work Item
ASTM WK78367

New Guide for the Standard Practice for Evaluating Nighttime Retroreflective Sheeting Effectiveness using Positive-Contrast Textual Sign Scenario Performance Analysis

1. Scope

The scope of the Committee shall be the promotion of knowledge, stimulation of research, and the development of standards pertaining to asphalt materials used in pavements, asphalt surface treatments, aggregates used in asphalt mixtures, graded aggregate used in bases or subbases, and to other materials, products, systems, and services incidental to all types of highway and transportation construction and maintenance. The types of standards developed include, but are not limited to, specifications, test methods, practices, guides, and terminology.

The work of this Committee will be coordinated with other ASTM committees and other organizations having mutual interest.
The activities shall be coordinated with other ASTM Committees when necessary.
The area of interest of the Committee is materials used in the construction and maintenance of highways, and other transportation construction.


Retroreflective sheeting, nighttime sheeting performance, retroreflection, sign performance, roadway sign, roadway sign performance at night, textual traffic sign, traffic sign, traffic sign performance


A standard practice on the nighttime performance of retroreflective sign sheeting performance used on traffic signs through viewing scenarios has been developed and is expected to be published soon. The committee determined that a supplementary guide will be needed to aid the practitioner in using this standard practice and help ensure that they are educated and competent about the practice and accurate in interpreting its output. Sign sheeting is only one variable in the practice, and the user should understand the intent and scope of the other variables to determine the best set of scenarios that suit their needs. Such variables include headlamp percentiles, vehicle types and mixes, sign placements, letter sizes and variables that are correlated with letter size, and the effect of visual complexity. The standard guide will elaborate on these variables, their interactions with each other, and their correlations with other variables that were outside the scope of the standard, helping the user make an informed decision on the representative scenarios and provide an accurate perspective on the output of the practice.

The title and scope are in draft form and are under development within this ASTM Committee.


Developed by Subcommittee: D04.38

Committee: D04

Staff Manager: Ashley Wiand

Work Item Status

Date Initiated: 09-20-2021

Technical Contact: Fuat Aktan

Item: 000