There’s a new-ish kind of road sign on Irish roads. I like it. The sign combines a speed camera and an instruction.

When you’re travelling along a road with a certain speed limit, the sign shows you the speed you’re going. If you’re going in excess of the speed limit, which is also displayed in the sign, the speed shows red. When you dip under the speed, it shows green. Crucially, after it shows you your speed in green it then posts a ‘thank you’, also in green.

These are signs with manners. They thank you for obeying their rules. But, crucially, they remind you about the speed limit in a creative way and also encourage you to drive below the limit. You comply, and you get your reward, someone’s – or something’s – thanks.

I have no data on this, but I would imagine that these new-ish signs are effective, certainly more effective than other kinds. Until, perhaps, we tire of the novelty factor. But will we ever tire of someone using good manners?