March 2010
Current US motorcycle and bicycle helmet laws with maps | History of US motorcycle helmet laws
The history of motorcycle helmet laws in the United States is characterized by change. In 1967, to increase motorcycle helmet use, the federal government required the states to enact helmet use laws in order to qualify for certain federal safety programs and highway construction funds. The federal incentive worked. By the early 1970s, almost all the states had universal motorcycle helmet laws ("universal" in the sense that they covered all riders). Michigan was the first state to repeal its law in 1968, beginning a pattern of repeal, reenactment, and amendment of motorcycle helmet laws. In 1976, states successfully lobbied Congress to stop the Department of Transportation from assessing financial penalties on states without helmet laws. By 1980, most states had repealed or limited their motorcycle helmet laws to cover riders younger than 18, but not older riders. Later states that had repealed the law, reinstated it but only for young riders. All but 3 states (Illinois, Iowa, and New Hampshire) now require some or all motorcyclists to wear helmets. Since 1997, Arkansas, Florida, Kentucky, Pennsylvania, and Texas have changed their laws covering all riders to apply only to young riders. And most recently, Louisiana moved from a partial to a universal motorcycle helmet law.
The changes in helmet laws have created a natural laboratory for researchers to study the effects of the laws on helmet use rates and on motorcycle deaths and head injuries. Helmet use rates approach 100 percent under universal laws (currently, in 20 states and the District of Columbia), but partial laws that cover only some motorcyclists (currently, in 27 states) are widely disobeyed. For research results on this subject, see Q&A: Motorcycle helmet use laws
Bicycle helmets also prevent injuries, but no state has a universal bicycle helmet law. Only 21 states and the District of Columbia have statewide bicycle helmet laws, and they apply only to young riders (often riders younger than 16). Local ordinances in a few other states require bicycle helmets for some or all riders. For research results on this subject, see Bicycles
