A TikTok user has shared the hidden reason why most motorway signs are green in the US or blue in the UK - and it's probably not what you would expect.

Interestingly, UK motorway signs can also appear in blue. The TikTok video discussing this topic has attracted considerable ...

It's interesting to note that not all UK motorway signs are green as some are blue. The TikTok clip has gone viral, amassing over 55,800 likes and 4,400 shares.

Thomas notes: “While the sign may look a bit Mad Max-ish, snow chains (or tyre chains as they are also known) are required on certain EU member country driving routes. These help increase your vehicle ...

It's worth mentioning that not all UK motorway signs are green; sometimes they're blue - another soothing colour. Since the video was posted, it has garnered over 55,800 likes and 4,400 shares.