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I was pleased to see that most people agreed with what I thought, that ALL drivers should have periodic tests of competence, rather in the way that the vehicles are subject to yearly Ministry of Transport tests. I think the age of a driver does not in itself indicate a bad or daft driver, they can be of any age. However, it is without doubt that reaction times slow down as we get older, but not as much as might be imagined in those whose minds are active.
As for who would pay for this, the answer is clear, the driver. The same objection was made when the yearly mechanical test was introduced for brakes, lights and steering, now expanded to include loads of other factors. I have to undergo a medical exam to renew my Passenger Carrying Vehicle licence every five years, and I am charged �60 by my local surgery for the privilege. Who pays? Me of course; who else. Let's have an MoT for drivers I say. It can only improve standards in general and surely contribute to saving lives on the road.