Boxes stacked on dumbbells are unstable

This sign looks like someone’s knocked over a box that was sitting on a dumbbell, but it’s to indicate that lorries (or other vehicles with a high centre of gravity) are at risk of tipping over around the next right-hand bend. You won’t find this sign in the UK – it’s an Australian sign.

Ever thought about driving a lorry for a living, or maybe you’ve got a friend that wants to? Have a go at our free HGV Highway Code quizzes and see whether you’ve got the brain power for it. Click here to try some out.