The Development History of Helmet Safety Standards
The motorcycle helmet is the most important piece of rider safety equipment. The establishment and evolution of its safety standards reflect decades of motorcycle culture and public-safety awareness.
The history of helmets can be traced to military use during the Second World War. German motorcycle troops had begun using simple leather helmets, while the U.S. military issued M1 steel helmets as head protection for motorcyclists. However, these helmets were not designed specifically for motorcycles and offered limited protection.
In the 1950s, as motorcycle speeds rose and traffic accidents increased, demand began to emerge for professional motorcycle helmets. Companies such as Bell and Schuberth began developing dedicated motorcycle helmets, using glass-reinforced plastic (GRP) as the shell material and expanded polystyrene (EPS) as the energy-absorbing liner.
In 1963, America's Snell Memorial Foundation created the first motorcycle helmet safety standard. The Snell standard was founded by Dr. William Snell in memory of a young rider who died in a motorcycle accident. It required helmets to withstand impacts at specified speeds and limited the acceleration transmitted to the head. This standard became the benchmark for helmet safety in the United States and had far-reaching influence.
In the 1970s, European countries began establishing their own safety standards. Britain's BSI (British Standards Institution) published the BS 2001 standard in 1972, defining helmet impact-test methods and pass criteria. Germany's DIN (Deutsches Institut für Normung) also issued similar standards. These standards gave helmet safety an objective basis for evaluation.
In the 1980s, the Snell standard became controversial because of its strictness. Critics argued that Snell may have overemphasized high-speed impact protection while overlooking low-speed impacts and rotational injuries. Helmet manufacturers also complained that the Snell standard increased production costs and technical difficulty.
In the 1990s, the Economic Commission for Europe (ECE) issued the ECE 22.05 standard, which became the most widely adopted helmet safety standard in Europe and around the world. ECE 22.05 test items included impact absorption, penetration resistance, strap strength, and field of view, making it more comprehensive than the Snell standard.
In the 2000s, the DOT (Department of Transportation) standard became mandatory in the United States. The DOT standard, created by the National Highway Traffic Safety Administration (NHTSA), had looser testing requirements than Snell and ECE, drawing criticism from safety experts. Critics argued that the impact-test speeds in the DOT standard were too low to effectively protect riders.
In 2013, ECE released the latest R22.06 standard, adding rotational-impact and multiple-impact tests, reflecting advances in head-protection science. R22.06 requires helmets to retain protective ability after repeated impacts and adds protection requirements for oblique impacts.
The technical evolution of helmet design also reflects the influence of safety standards. In the 1980s, full-face helmets gradually replaced open-face helmets as the mainstream. Full-face helmets provide more complete head protection, and their field-of-view designs became more rational. In the 2000s, aerodynamic helmet design became mainstream in competitive settings such as MotoGP, with aero kits and chin spoilers becoming standard.
The application of new materials also improved helmet safety. Carbon-fiber reinforced plastic (CFRP) and Kevlar allowed helmets to provide higher rigidity and penetration resistance at lower weight. In the 2020s, MIPS (Multi-directional Impact Protection System) became standard equipment on high-end helmets, reducing brain injury during oblique impacts.