People are only just realising why motorway signs are green – and reason is clever
![People are only just realising why motorway signs are green – and reason is clever](https://i2-prod.dailystar.co.uk/incoming/article33102879.ece/ALTERNATES/s615/0_Sign-for-London-Colney-Roundabout-with-directions-for-Hatfield-London-St-Albans-and-London-Colney.jpg)
There are a lot of things you might have never realised when you're behind the wheel, but surely you've spotted motorway signs can sometimes come in a green colour
There are a lot of things you might have never realised when you're behind the wheel, but surely you've spotted motorway signs can sometimes come in a green colour