When is a bus driver not allowed to drive?

You have selected all the correct options regarding when a bus driver is not allowed to drive. According to German traffic regulations, a bus driver must not operate a vehicle if they are suffering from a notifiable contagious disease, as this can endanger the health of passengers and the public. Additionally, if someone in the driver's household has a notifiable contagious disease, it raises the risk of transmission, warranting restrictions on driving. Lastly, if a driver is seriously indisposed, their ability to safely operate a bus is compromised, which could lead to accidents or unsafe conditions on the road. Selecting all relevant options is crucial as each situation presents a distinct risk that could affect road safety. Understanding these rules helps ensure that public transportation remains safe for everyone involved.