This study investigates the relationship between ergonomic highway design and safety outcomes through analysis of 500 km of highway corridors and 3,456 accidents over five years. Using mixed methods combining geometric measurements, driver response studies, and accident data analysis, we establish empirical relationships between design parameters and driver performance. Results indicate that sharp curves (R<300m) increase response times by 68% and accident rates by 224%, inadequate signage placement reduces appropriate driver responses from 91% to 52%, and substandard pavement markings increase lane departures by 317%. Multiple regression models explain 71% of accident variance through measurable design parameters. The study proposes evidence-based recommendations projecting 40-50% accident reduction through systematic ergonomic improvements with benefit-cost ratios of 4:1 to 40:1.
Highway safety, ergonomic design, driver response time, road geometry, human factors, accident reduction.
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