Photometric Measurements of Roadway Sign Installations

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This guide provides test procedures and methods of obtaining and reporting data that will promote the uniform evaluation of the photometric nighttime performance of roadway sign installations.

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Description

This guide provides test procedures and methods of obtaining and reporting data that will promote the uniform evaluation of the photometric nighttime performance of roadway sign installations.

The guide generally applies to all roadway sign installations using an integral lighting system. These signs may be externally illuminated, utilizing nontransparent (opaque) surface materials (legend, border, and background); or, they may be internally lighted, utilizing translucent sign materials. This guide does not address the measurement and evaluation of luminous source message signs (matrices of individual lamps or other luminous elements making up a message). In the context of this guide, retro-reflective sign materials are considered only insofar as they yield luminance values due to their fixed lighting systems. Additional information is available for photometrically evaluating roadway signs made of reflective materials that are illuminated by automotive headlights.

Reaffirmed 2014

Softcover or Digital PDF: 9 pages
Publisher: Illuminating Engineering Society (2003)
SKU: LM-52-03
ISBN-13: 978-0-87995-196-2
Dimensions: 8½” x 11″

Additional information

Weight 1 lbs
Dimensions 11 x 8.5 x .25 in
Format

Digital, Softcover

Table of Contents

  • Foreword
  • Introduction
    • Objective
    • Scope
  • Conditions of Test
    • General
    • New Installations
    • Old Installations
    • Electrical Conditions
    • Extraneous Light
  • Test Equipment
    • General
    • Illuminance Measurement Instrumentation
    • Luminance Measurement Instrumentation
    • Electrical Instruments
  • Test Procedures
    • Making Illuminance Measurements
    • Making Luminance Measurements
      • Legend
      • Border
      • Background
      • Luminance Contrast
      • Gradient
  • Test Report
  • References
  • Annex A – Determining Test Area Sizes and Measurement Locations on Example Signs