Drivers have been left baffled after encountering a rare road sign on the roads, with many admitting they have no idea what it's telling them.

The sign in question is a red-bordered circular road sign, seemingly blank and showing nothing in the middle (pictured below).

It's likely most drivers will struggle to tell you what it means when they see the sign, because it appears to be empty.

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And some admit they have been left baffled and anxious about the prospect of a fine for falling foul of rules.

And if motorists encounter this sign, they should not proceed any further.

That's because it signals no vehicles allowed, except bicycles being pushed.

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