If this light appears on your dash, you have either intentionally, or unintentionally, turned on cruise control. Cruise control helps maintain the speed of your vehicle without touching the accelerator or brake pedals, which may come in handy in certain situations. To turn this feature on or off, press the ON/OFF button on the cruise control lever.
If this warning light is illuminated, but yellow: you should stop your car immediately. This means there is a malfunction in your cruise control system, and if untreated, could lead to a possible accident. You should have your car inspected as soon as possible to prevent any possible accidents.