Reins are the means by which a horse rider or driver communicates directional commands to the horse's head.

The driver turned to the radio, mounted above the right rear wheel well, and communicated with the Airborne Board.

With the microphone array, drivers can now communicate with members of the team at any point in the race.

A variety of satellite-based services helps companies and their drivers communicate with each other.

A driver typically communicates with the device through the computer bus or communications subsystem to which the hardware connects.

The two drivers communicated by signals using the engine whistles.

The driver, guard and fireman communicate with each other by an electric bell system.

They'd even liberated some walkie-talkies so the drivers could communicate with each other.

The driver could more mundanely communicate with the outside world using a vehicle horn.

She was certain that the drivers not only communicated with one another, but with a central dispatcher as well.