Another interesting instance in Glenageary was given on "Today with Pat Kenny" this morning. A dual carriage has a 30 mph speed limit, even though it is a perfectly good road and should have at least a 40 mph limit. One then goes into an area which is not a dual carriageway and past a special school where the limit goes up to 40 mph. There must be consistency and coherence in speed limits if citizens are expected to observe and respect them.