A communication system for a vehicle includes an antenna array for transmitting data to at least one other vehicle or structure. A control is operable to adjust a beam transmission of the antenna array responsive to determination of a driving condition of the vehicle. The control may adjust the beam transmission from an omnidirectional beam to a directed beam to enhance the transmission range of the beam. The control may adjust the beam transmission to the directed beam directed rearward of the vehicle responsive to a determination of a highway driving condition. The control may adjust the beam transmission responsive to a determination of at least one of (i) a highway driving condition, (ii) a high traffic driving condition, (iii) an intersection driving condition and (iv) a weather condition at the vehicle.
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