The Snell Memorial Foundation and the Department of Transportation (DOT) are two organizations that set standards for motorcycle helmet safety. While both standards aim to ensure the effectiveness and quality of helmets, there are some key differences between the Snell and DOT test standards. Here's an overview:
- Snell Standard: The Snell Memorial Foundation is a non-profit organization that has been establishing helmet standards since 1957. Snell standards are generally considered to be more stringent and demanding than the DOT standards. Snell-certified helmets are known for their high level of protection.
Testing: Snell conducts both impact and penetration tests on helmets. The impact test involves dropping the helmet from a specific height onto various anvils to measure its ability to absorb and distribute impact energy. The penetration test evaluates the helmet's resistance to sharp objects striking its surface.
Frequency of Testing: Snell requires random samples of helmets to be obtained from the market for testing every year.
Retesting: Snell helmets must undergo recertification every five years to ensure continued compliance with the standard.
- DOT Standard: The Department of Transportation is a federal agency in the United States that sets safety regulations for various modes of transportation, including motorcycles. The DOT standard is mandatory for motorcycle helmets sold in the U.S.
Testing: DOT tests primarily focus on impact attenuation, meaning the helmet's ability to absorb and reduce the force of an impact. The tests are conducted by dropping the helmet from a fixed height onto a flat anvil.
Self-Certification: Manufacturers are responsible for testing their own helmets to meet DOT standards. They must certify that their helmets meet or exceed the requirements set forth by DOT.
Labeling: DOT-certified helmets must display a DOT sticker on the exterior, indicating compliance with the standard.
It's important to note that while Snell and DOT standards provide some level of assurance regarding helmet safety, they are not the only indicators of quality. Other standards, such as those set by the Economic Commission for Europe (ECE) or the British Standards Institution (BSI), are also commonly used and may have their own testing criteria. When purchasing a motorcycle helmet, it's recommended to consider multiple standards, try on different helmets for fit and comfort, and choose a reputable brand known for producing high-quality helmets.