Patent US 5,874,893

A vehicular anti-smoking system is provided including at least one speaker connected to a conventional stereo system of a vehicle. The speaker is adapted to transmit audio signals upon the receipt thereof. Further provided is at least one relay having a first input connected to the stereo system, a second input, and an output connected to the speaker. The relay has an normal first mode wherein the speakers are connected to the stereo system via the first input and a second mode only during the receipt of an activation signal wherein the speaker is connected to the second input. A control mechanism is connected to the relay means and adapted to transmit the activation signal thereto upon the activation of the vehicle. Finally, a play back device is connected between the control mechanism and the second input of the relay. In use, the play back device is adapted to transmit an audio signal representative of an audible anti-smoking remark upon the receipt of the activation signal.