Its simple.. On a long road such as Umm Said, Al Khor Road etc.. When you feel you are in so rush and would like to maintain a steady speed of your car you activate the Cruise Control. Push the button for a cruise control and see if the light glows some where on your odometer. Accelerate the car to any speed you prefer eg: 100kms per hour and press the set button. And release the accelator pedal and your car automatically will maintain the set speed.

If you wish to disable the cruise control you can apply steady breaks or cancel using the same cruise control button.

I hope this info helps !