When is a speed limit not a speed limit? On the A19 this week I have driven through a set of phantom roadworks.

The signs are there, counting you down to the lane filter and warning several times that the limit is about to be 50mph. So we all slow down and ? nothing. A one-mile stretch of a perfectly normal dual carriageway. The roadworks have long gone but the contractors have not been to collect the signs. I am curious, does anyone know if these speed limits still apply in this case? Thought I had better ask. Write to me at BBC Look North, Barrack Road, Newcastle NE99 2NE.