The World Health Organization has released a Road Safety Manual for decision-makers and practitioners concerning Speed Management. Speed has been identified as a major key risk factor in road traffic injuries, influencing both the risk of crash as well as the severity of the casualties. This second edition of the Speed Management Manual offers guidance to help decision makers and practitioners put in place the comprehensive set of laws, regulations and actions needed to save lives. Rooted in new case studies and evidence, including from low- and middle-income countries, it includes guidelines for safe speeds, ensuring safer mobility for all road users and actions to improve emergency responses to crashes.