When is it appropriate to drive below the speed limit?

Driving below the speed limit is appropriate when conditions are less than perfect. This encompasses various scenarios that could affect road safety, such as adverse weather conditions (like rain, snow, fog, or ice), heavy traffic, or poor visibility. In these situations, maintaining a slower speed can enhance safety for both the driver and other road users, as it allows for better reaction times to potential hazards and helps prevent collisions.

The other options do not reflect appropriate or safe driving practices. For example, driving below the speed limit simply because the road is clear does not account for the necessity to adjust speed according to conditions. Driving at any speed below the limit based solely on personal preference without consideration for road conditions can lead to dangerous situations. Finally, while rush hour traffic may warrant different consideration, consistently driving under the speed limit without an apparent reason can cause frustration for other drivers and could also lead to accidents.