How safe is LPG in an accident?

Very, much more than petrol or diesel. It’s a common misunderstanding that because LPG is a gas, it’s highly explosive. However, because of the way it’s stored, it can’t explode in an accident as it never comes into contact with oxygen, unlike petrol. Furthermore the LPG tank can survive far greater impact than a normal petrol tank and has numerous in-built safety devices.