HIGHWAY SMOKE STUDIES

THE SUBJECT MAY BE DIVIDED INTO THREE PHASES: (1) ESTABLISHING EVALUATION CRITERIA, (2) DEVISING INSTRUMENTATION, AND (3) FORMULATING MEASUREMENT TECHNIQUES AND STANDARDS. THE POSSIBLE EVALUATION CRITERIA HAVE BEEN REVIEWED AND THE SMOKE CRITERION SELECTED WAS THE REDUCTION IN VISIBILITY RATHER THAN THE ANNOYANCE, DISCOMFORT, OR NUISANCE ASPECTS. VISIBILITY IS SHOWN TO BE RELATED TO BRIGHTNESS RATIOS AND CONTRASTS. AN INSTRUMENT FOR MEASURING BRIGHTNESS RATIOS AND CONTRASTS HAS BEEN DESIGNED AND A WORKING MODEL HAS BEEN CONSTRUCTED AND CALIBRATED. PRELIMINARY FIELD DATA ARE SHOWN FOR SEVERAL SETS OF SMOKE CONDITIONS. THE PLAN FOR A COMPLETE STUDY IS OUTLINED TOGETHER WITH SUGGESTIONS FOR TECHNIQUES FOR FIELD MEASUREMENTS AND STANDARD DEFINITIONS. /AUTHOR/

• Record URL:
  https://onlinepubs.trb.org/Onlinepubs/hrbproceedings/28/28-030.pdf
• Supplemental Notes:
  • Vol 28, pp 354-364, 10 FIG, 4 TAB, 5 REF, 1 APP. Distribution, posting, or copying of this PDF is strictly prohibited without written permission of the Transportation Research Board of the National Academy of Sciences. Unless otherwise indicated, all materials in this PDF are copyrighted by the National Academy of Sciences. Copyright © National Academy of Sciences. All rights reserved.
• Authors:
  • FINCH, D M
• Publication Date: 1949

Media Info

• Media Type: Digital/other
• Monograph Title: Proceedings of the Twenty-Eighth Annual Meeting of the Highway Research Board Held at Washington, D.C. December 7-10, 1948
• Serial:
  • Highway Research Board Proceedings
  • Volume: 28
  • Publisher: Highway Research Board

Subject/Index Terms

• TRT Terms: Brightness; Mathematical models; Smoke; Visibility
• Uncontrolled Terms: Criteria; Models
• Subject Areas: Highways; Safety and Human Factors;

Filing Info

• Accession Number: 00223503
• Record Type: Publication
• Files: TRIS, TRB
• Created Date: Sep 19 1971 12:00AM