Eleven traffic control signs were studied to determine several visibility thresholds in uncluttered, nighttime conditions with alerted subjects. Initial detection and sign comprehension thresholds were compared, respectively, to analytically determined driver detection and recognition requirements. All signs met the detection requirements. Regarding recognition, inadequacy of certain signs was indicated; they were the WRONG WAY and STOP signs for higher speed traffic and the School Crossing sign even at urban speeds. Certain other sign weaknesses were identified.
Luminous Requirements for Traffic Signs: A Comparison of Sign Performance and Requirements
1981
40 pages
Report
Keine Angabe
Englisch
Color , Traffic signs , Detection , Perception , Brightness , Highway Engineering , Night , Visibility
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