A vehicle system includes a communication device programmed to transmit alert signals from a host vehicle to at least one target vehicle. A user interface device is programmed to present a graphical representation of the at least one target vehicle and receive a user input representing a selection of the at least one target vehicle. A processing device is programmed to command the communication device to transmit the alert signal to the selected at least one target vehicle in response to the user interface device receiving the user input representing the selection of the at least one target vehicle.
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