Abstract: A drive through order system having a vehicle detection system that includes at least two sensors, each affixed to an immovable object, a CPU coupled to a computer readable medium containing instructions to process information from the sensors using fuzzy logic and to output an indicator signal reflecting the presence of a vehicle within a volume sensed by the sensors. In some embodiments, a learn mode supports alteration of fuzzy logic processing parameters. In various embodiments, the system is upgradable and sensor types can be changed and/or new sensors added. In some embodiments, fuzzy logic processing information is modified in dependence upon temporal information.