🌐EnglishEnglishEspañolFrançaisPortuguêsالعربيةفارسیहिन्दीEntityQ5437779· pop 7· linked from 20 articlesfatigue as safety concernhuman tiredness as a major safety hazard, often considered an internal precondition for unsafe actsConnectionsNational Transportation Safety BoardEntitytransportEntityCategoriesFatigueTransport safety