Police now have the perfect evidence to charge the driver after she crashed - she caught it all on her own camera.

An Australian woman was more than three times over the legal blood alcohol limit when she used her phone to film herself speeding and driving carelessly moments before careening off the road.

The Snapchat video was taken by the driver seconds before she crashed.

Melbourne crash investigators believe an imprint of a Mazda logo on the phone's screen was caused by the deployment of the airbag.

The driver escaped without serious injury.

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Victoria Police posted the footage on its Facebook page.

VICTORIA POLICE The phone even had the Mazda's airbag imprint on its screen.

On their post, they said "Oh snap! This is footage of a driver's Snapchat video taken seconds before she ran off the road and crashed, thankfully without serious injury."

She was charged with speeding, careless driving, a blood alcohol reading of 0.164 and using a mobile phone while driving.