Samenvatting
A survey of passenger cars in 16 cities was conducted across an 8-month period by observing safety belt usage by drivers as they stopped for traffic signals at primary road intersections and freeway exits. A supplementary survey was conducted at O'Hare airport rental cars check-ins to compare usage of single versus dual retractor safety belts. Overall safety belt usage was found to be 18.5% with usage of the lap-shoulder combination belt system significantly higher than that of the lap-shoulder separate or lap-belt only systems.