When should a driver avoid using cruise control?

Using cruise control in adverse weather conditions is discouraged because such situations require a driver's full attention and frequent adjustments to driving inputs. Adverse weather, including rain, snow, ice, or fog, can significantly impact vehicle handling and traction. Drivers must be prepared to react quickly to changing conditions, such as reduced visibility or slippery roads, which can necessitate sudden braking or acceleration. Engaging cruise control can lead to a delayed reaction in these scenarios, increasing the risk of losing control of the vehicle.

In contrast, operating cruise control on open highways, in low-speed zones, or while traveling downhill is generally safer under normal conditions. However, specific care should still be taken in each of these situations: open highways can benefit from cruise control, but it should be avoided in low-speed zones and when descending steep grades, where manual control over speed is critical for safety.