System and method for monitoring emissions from a cell phone in a vehicle having a driver side and a passenger side. A first directional antennas is aimed toward the passenger side, a second directional antennas is aimed toward a location in which a head of a driver would be situated when a driver is situated on the driver side, and a third directional antenna is aimed toward a location below the location at which the second antennas is aimed on the driver side. A receiver is associated with each antenna and includes at least one amplifier and a rectifier module that converting radio frequency signals to direct current signals. A microprocessor processes the direct current signals received and determines based thereon which antenna provides a strongest signal, which can be correlated to a most likely location of a cell phone being used by an occupant in the vehicle.