In yet a further embodiment, it is possible to broadcast first and second audio signals simultaneously. Such signals could either be broadcast from speakers on the control device 75 or by speakers of the vehicle under control of the control device 75. For example, the speaker aimed toward the driver or closest to the driver may broadcast a short duration tone at a first frequency, such as 19,100 Hz, while the speaker aimed toward the passenger or closest to the passenger may broadcast a short duration tone at a different frequency, such as 19,200 Hz. The length of the tones are predetermined. Preferably, the tones could be short, such as ten (10) milliseconds (ms), or longer, such as one (1) second.