Disturbing video has emerged of a woman unleashing an abusive and racial tirade on a bus driver simply going about his business.

Mobile phone footage taken by a startled passenger shows the woman becoming aggressive towards the driver, demanding he ‘put the number on the bus’ because the route number is not currently displayed.

Her demands soon escalate into racist taunts and she stands in front of the bus before threatening violence.

The shocking verbal attack lasts almost five minutes.

It is not known when the footage was taken, but it was uploaded to Youtube on Sunday.

The incident is believed to have occurred on Belair Rd at Kingswood, in Adelaide’s southern suburbs.

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