In article , Paul
Weaver writes
Came through the dartford tunnel for the first time tonight, in the
right hand land, and noticed, just underneath the 50 limit, a white 10
on a blue background - is this a minimum speed limit sign? I didnt
think the UK had them. Why is it only on a 300 yard stretch?
The are quite common in tunnels etc. where it would be difficult if
people stopped or went very slow. The Blackwall tunnel used to have them
(it may still do so).


--
John Alexander,