Police spotting (junction watch)

FWIW, I think the UK has generally very well designed road signage, barring the odd aberration created by local council numpties. The not-crossing-out thing makes sense once you know the rationale - which should take about 30 seconds of reading the highway code - but it does catch a lot of people out.

[doctornick] Inflammable means flammable? What a crazy language! [/doctornick]

Is that because a sign with a line through it means 'end of (thing on sign)'? or because putting a line through a picture makes it harder to work out what it actually is?