Brencud, thanks for your response. A sad fact is motor vehicles are here in massive numbers and will be for some time. As much as some people would like to plan them out of our lives they are a fact of matter and we should work round that. Traffic calming measures are great in theory but occasionally have a negative impact. A small proportion of people see them as part of a rally stage and go.for it whilst larger vehicles (usually diesel) slow down as they approach and then accelerate away from them adding a good lungful of pollutants to the air.
However I digress. I believe that enforcement is the way forward. Pity there is no money/desire for it.
P.S. anyone know what time the great and good defended on Manor Mount the other day?