A fatal traffic accident occurred near Mezőszemere on the M3 motorway, heading towards Budapest. A truck collided with a bridge support, resulting in the immediate death of the driver. Emergency services responded to the scene, but were unable to save the individual. The cause of the incident is currently under investigation by authorities. Traffic on the M3 motorway was significantly disrupted following the crash, with lane closures implemented to facilitate rescue and investigation efforts. The accident has raised concerns about road safety on this major transport route. Further details are expected to be released as the investigation progresses.