National Highway Traffic Safety Administration NHTSA National Highway Traffic Safety Administration National Highway Traffic Safety Administration Administración Nacional de Seguridad del Tráfico en Carreteras Administración Nacional de Seguridad del Tráfico en Carreteras Administration nationale de la sécurité routière המנהל לבטיחות בדרכים הלאומי राष्ट्रीय महामार्ग यातायात सुरक्षा प्रशासन 米国国家道路交通安全局 Administração Nacional de Segurança no Trânsito Rodoviário 美国国家公路交通安全管理局 NHTSA National Highway Traffic Safety Administration The National Highway Traffic Safety Administration (NHTSA) is an agency of the Executive Branch of the U.S. government, part of the Department of Transportation.