Retro-reflective sheeting on signs is important mainly for:
Choose the correct answer
Increasing sign weight
Preventing drainage
Night-time visibility by returning headlight beam
Reducing wind load only
Correct Answer
C. Night-time visibility by returning headlight beam
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Retroreflective materials improve sign visibility under vehicle headlights. Reference: IRC:67-2021 Code of Practice for Road Signs; PDF page references from downloaded public copy Sec.6, Tables 6.2-6.7; PDF pp.16-22
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