Kraus J F, Peek C, Williams A
Southern California Injury Prevention Research Center, University of California, Los Angeles 90024-1772.
Am J Public Health. 1995 Jan;85(1):96-9. doi: 10.2105/ajph.85.1.96.
To evaluate helmet use in California before and after the introduction of an unrestricted helmet use law on January 1, 1992, observations of motorcycles and their riders were made at 60 locations in seven California counties, twice before and four times after the law was introduced. Helmet use increased from about 50% in 1991 to more than 99% throughout 1992. Compliance was achieved despite variations in helmet use by motorcycle design and road type. Seven percent of riders used nonstandard helmets after the law. With adequate enforcement, unrestricted helmet use laws can achieve almost 100% compliance and reduce the number of people riding motorcycles.
为评估1992年1月1日加利福尼亚州实施无限制头盔使用法前后的头盔使用情况，在加利福尼亚州七个县的60个地点对摩托车及其骑手进行了观察，该法律实施前观察了两次，实施后观察了四次。头盔使用率从1991年的约50%上升到1992年全年的99%以上。尽管不同设计的摩托车和不同类型道路上的头盔使用率存在差异，但仍实现了合规。法律实施后，7%的骑手使用非标准头盔。通过充分执法，无限制头盔使用法可实现近100%的合规率，并减少骑摩托车的人数。
