Under what condition can you drive for two additional hours after exceeding your driving limit?

The correct answer is based on the regulations set forth in the hours-of-service rules, which are designed to prevent driver fatigue and ensure safety on the roads. When a driver encounters adverse weather conditions, it may necessitate additional driving time to reach safety or to find a suitable place to stop if the conditions become hazardous. In these scenarios, the rules allow some flexibility to accommodate situations where safety may be compromised due to weather. It's important for drivers to balance safety and regulations, but this particular provision acknowledges that adverse weather can create situations requiring extended driving under careful consideration.

The other options do not provide the necessary conditions recognized by the hours-of-service regulations for extending driving time. Feeling well-rested is important for safe driving but does not justify violating limits set by the regulations. Observing the speed limit does not affect the time you are allowed to drive; it is more about operational safety than hours of service. Having a co-driver is beneficial for long-haul journeys and allows for breaks but does not change the legal limits for driving time unless both drivers are managing the driving hours according to regulations.