An improved system of determining the speed at which an agricultural vehicle is traveling is disclosed. A control system for the sprayer receives feedback signals from multiple sensors, where each feedback signal may be utilized to determine the speed at which the sprayer is traveling. An operator interface, such as a touch-screen terminal, is provided to receive input from the operator for selecting one of the feedback signals. Each of the feedback signals has certain operating conditions under which they are more or less reliable. The operator may select one of the feedback signals from which the speed of the sprayer is determined according to the present operating conditions. The speed determined from the selected feedback signal is then used by the sprayer to control and record application of product to the field.
