Final answer:
Exceeding on-duty hours as a driver may lead to being ordered out of service by an enforcement officer, and while immediate arrest is unlikely, there may be subsequent legal or employment consequences.
Step-by-step explanation:
If you exceed your maximum on-duty hours and an enforcement officer stops you, the consequence would most likely be that you can be ordered out of service. Enforcement officers have authority similar to police officers when it comes to upholding regulations related to on-duty hours for drivers. For example, drivers assume a police officer has the authority to enforce traffic laws and would pull over when they see the lights of a police car; enforcement officers have analogous authority in the context of transportation regulations. Being ordered out of service means that you have to cease driving immediately and take the necessary off-duty time. You would not be immediately arrested, although there could be legal or financial penalties later, and job loss could be a potential consequence depending on company policy or if the offense is repeated and severe enough.