Under what condition should a driver disengage the cruise control?

Disengaging the cruise control during adverse weather conditions is essential for maintaining safety and control of the vehicle. Adverse weather, such as rain, snow, ice, or strong winds, can significantly affect traction and the vehicle's handling. In these conditions, drivers need to remain agile and responsive, ready to take immediate action to adjust speed or direction as necessary. Cruise control can lead to a false sense of security, potentially delaying crucial reactions in an emergency situation, such as needing to brake suddenly or maneuver around an obstacle.

In contrast, utilizing cruise control on flat roads or in good weather is generally safer and more conducive to maintaining a steady speed without the need for constant manual input. Driving on long highways without traffic may also be appropriate for cruise control usage, as these conditions typically allow for greater stability and predictability. However, when faced with adverse weather, it is crucial to prioritize safety by manually controlling the vehicle for optimal responsiveness.