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For the second time in three weeks we made the front page of the Darlingon Advertiser; the free newspaper which is delivered to every home in the town each week: Call for 20mph town speed limit.
For me the key fact to consider is: 90% of people hit by a vehicle at 40mph die, 20% at 30mph and only 2.5% at 20mph. I don't think any other argument is really needed.