Cruise Control Driving Cruise control can be used to automatically control the speed in your vehicle (usually over 25-35 miles per hour) without keeping your foot on the accelerator. It is a great tool to prevent driver fatigue, speeding, and help with fuel economy during long trips on flat, straight roads and highways. Cruise control can cause accidents if you use it improperly or in hazardous road conditions such as city streets, heavy traffic, hills, winding roads, and wet, slippery roads. Controlling the speed of your car with your fingertips on cruise control lets you take your foot off the accelerator and...