SmartGuard: An IoT-Enabled Intelligent Helmet System with GPS Tracking, Collision Detection, and Emergency Response for Enhanced Road Safety. International Research Journal of Innovation in Science and Technology, [S. l.], v. 1, n. 3, p. 30–35, 2026. DOI: 10.67308/irjist.067. Disponível em: https://irjist.org/index.php/irjist/article/view/67. Acesso em: 30 jun. 2026.