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Reliable detection and sharing of information about fatigued or otherwise impaired drivers can provide valuable extra information to improve cooperative road traffic safety services. With such information, connected manually driven or automated vehicles in the area can proactively take precautions and prepare for possible risks caused by a fatigued drivers. In order to provide accurate assessment of the driver condition and efficient distribution for the related warnings, the proposed human tachograph service concept combines ubiquitous wearables-based driver monitoring with 5G connectivity. The combination of the real-time driver biosignals measured while driving and the historical data related to driver's sleep and physical activity outside the vehicle enables the driver condition to be assessed more accurately than with currently used on-board systems. Based on the driver condition analysis, the 5G-based traffic …