Question How can you tell if a helmet is DOT-certified? Answers It will have a label attached to the helmet stating the certification. DOT-certified helmets are the only type of helmet sold in North America. It will have a green dot on the inside of the helmet. Explanation A U.S. Department of Transportation (DOT)-compliant motorcycle helmet will have an attached label stating the manufacturer’s name and the model of the helmet. Take a FREE Practice Test Now This questions appears in the following tests: South Dakota Practice Test