Idiot proof or made you an idiot icon

Do you know what this sign means? Most probably if you're in the western countries you would have seen this sign on the dashboard of your car.

It was reported on autos.yahoo that this is supposing to be a 'idiot-proof' sign of low tire pressure.  This sign will be lighted if any one or more of your tires air pressure has dropped more than 25% of the need air pressure.

But surprisingly majority of the people who saw this sign on their car's dashboard doesn't really know what it means.  So the next time you see this sign lighted on your dashboard, it time you take your car to the nearest service center for assistance or you can just learn to pump up the tire pressure yourself.  It's not that tough as you thought it would be.