What does a vehicle need to do when it faces hazardous weather or road conditions?

A vehicle facing hazardous weather or road conditions should adhere to the posted minimum speed limit. This indicates that even under adverse conditions, it is crucial to maintain a speed that is above the threshold set for safety. This speed limit is established to ensure that vehicles can safely navigate the roads, enabling drivers to respond appropriately to road conditions while also considering the flow of traffic.

Maintaining a speed no lower than the minimum posted limit helps prevent potential hazards such as impeding the flow of traffic, which can lead to accidents, particularly on multi-lane roads. Drivers must adjust their speed to account for the conditions, but the minimum speed limit exists to prevent vehicles from going too slowly, which can create dangerous situations.

In contrast, options that suggest stopping immediately, reducing speed to half the maximum, or switching to high-speed mode do not account for the nuanced approach required when handling hazardous conditions. A sudden stop could lead to loss of control, while drastically reducing speed or choosing a high-speed mode is inappropriate in such scenarios. Therefore, maintaining a speed above the minimum limit aligns with safe driving practices in adverse situations.