According to the National Highway Traffic Safety Administration (NHTSA), airbags deploy during impacts that are likely to cause injury, and the threshold for deployment is between 8 and 14 miles per hour (about 13 to 23 km/hr) or faster for front airbags. For unbelted occupants, the airbag has a low-speed deployment, usually at speeds of around 10-12 miles per hour. For belted occupants, airbags deploy at speeds of 15-17 miles per hour. However, the triggering speed depends on additional factors such as the characteristics of the crash, the individual vehicle airbag systems design strategy, and the crash sensor locations. It is important to note that airbags are designed to deploy in moderate to severe crashes and are not intended to deploy in all crashes.