planer 10 especially if the delay between movements is greater than a predetermined time period e g 5 seconds 6 seconds 10 seconds 20 seconds 30 seconds etc fuel is saved by lowering the engine speed to the elevated idle speed s 2 without substantially compromising the speed of the milling operation s 2 is greater than or equal to s 1 which may be the lowest operating speed of the engine 26 the operator can then reestablish the desired operating speed s 3 s 4 or s 5 by pressing the rotor speed control switch 58 the desired number of times the second benefit provided by the disclosed control system is saving wear and tear on the clutch 50 specifically the clutch 50 remains engaged with the rotor 21 while the engine 26 is operating at the elevated idle speed s 2 the reader will note that if no movement of the cold planer 10 is detected after a predetermined time period following five different operator input actions shown at 108 112 117 121 and 125 the speed of the engine 26 is lower to the elevated idle speed s 2 thus the clutch 50 remains engaged with the rotor 21 disengagement of the clutch only comes after a complete shut down upon initiation by the operator a third benefit is the use of a single control mode for both milling and travel operations the operator does not need to know or remember what mode he she is in there is preferably only a single speed control that is used for milling and roading further it will be noted.