How many hours are you allowed on-duty before you are not allowed to drive?

In the context of hours of service regulations for commercial drivers, you are permitted to be on-duty for a maximum of 14 consecutive hours after coming on duty. This 14-hour window includes all time spent working, but it’s crucial to note that once this limit is reached, you cannot drive until you have been off duty for at least 10 consecutive hours. This regulation is designed to ensure that drivers are not operating vehicles while fatigued, thereby enhancing safety on the roads.

The other options represent durations that exceed the legal limits set forth by the regulations, ensuring adequate rest and preventing driver fatigue.