A prototype self-driving Google electric car. They are being programmed to toot their horns. Photo: Reuters

Google teaches driverless cars to honk (so in Hong Kong they’ll fit right in)

Electric cars, being virtually silent, need to let people know they are coming, Google engineers reason; unlike many human drivers they’ll be taught to toot their horns politely, considerately and safely

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A prototype self-driving Google electric car. They are being programmed to toot their horns. Photo: Reuters
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