There's an important reason for these strange patterns on British roads

If you've ever wandered around the streets of Britain, chances are you've crossed one of the yellow, bobbly patterned stretches of paving shown in the clip above.

But have you ever wondered what they're actually for?

For his latest video, YouTuber Tom Scott interviews Richard Holmes from the Royal National Institute of Blind People to find out more about the road markings -- all of which actually serve as a clever guide for visually impaired people.