Motorcycling advocacy is activism for motorcyclists seeking to establish and protect their rights, and to influence issues of interest to the motorcycling community. This includes lobbying organizations that work to influence laws, and groups or individuals who influence public attitudes. In the United States, the National Highway Traffic Safety Administration (NHTSA, part of the Department of Transportation) has been the main federal government agency active in the debate over motorcycle rights for such things as off-road riding, vehicle requirements and helmets.