When is a bus driver not allowed to drive?

A bus driver is not allowed to drive if he has a notifiable contagious disease, because he could endanger passengers and others through the spread of illness. If someone in his household has such a disease, there is also a risk of transmission, so he must not drive in that situation either. Additionally, if the driver is seriously indisposed (for example, very ill or physically unable), he cannot drive, because his ability to safely operate the vehicle is compromised. These rules help ensure the safety and health of both the passengers and the general public.