Molly Merrill-Francis, M.P.H., is a current Health Policy and Management Ph.D. candidate at the Johns Hopkins Bloomberg School of Public Health in Baltimore, MD. She received an M.P.H. in Health Behavior from University of North Carolina Gilling's School of Global Public Health in Chapel Hill, NC. Jon S. Vernick, J.D., M.P.H., is a Professor in the Department of Health Policy and Management at the Johns Hopkins Bloomberg School of Public Health. Prof. Vernick is the Co-Director of the Johns Hopkins Center for Law and the Public's Health and Director of Training and Education for the Johns Hopkins Center for Injury Research and Policy. He is also affiliated with the Eastern Region of the Network for Public Health Law. Keshia M. Pollack Porter, Ph.D., is a Professor in the Department of Health Policy and Management at the Johns Hopkins Bloomberg School of Public Health. Dr. Pollack Porter is Director of the School's Institute for Health and Social Policy and Director of the Research Core for the Johns Hopkins Center for Injury Research and Policy.
J Law Med Ethics. 2019 Jun;47(2):283-291. doi: 10.1177/1073110519857283.
Bicycle helmets protect against head injury. Mandatory helmet laws likely increase their use. Although 21 states and Washington, DC have mandatory helmet laws for youth (variously defined) bicyclists, no U.S. state has a mandatory helmet law that applies to all ages; however, some localities have all-age helmet laws for bicyclists. This study abstracted local helmet laws applicable to all-ages to examine their elements.
自行车头盔可预防头部受伤。强制性头盔法可能会增加头盔的使用。虽然 21 个州和华盛顿特区都对（不同定义的）青少年自行车手实施强制性头盔法，但美国没有一个州对所有年龄段的自行车手实施强制性头盔法；然而，一些地方对自行车手实施了全年龄段的头盔法。本研究提取了适用于全年龄段的地方头盔法，以检查其要素。
