Well, Gargoyle, 55 is not so old these days (at least I hope not, and I guess I'm biased, as I'm - ahem - not that far off that age group myself). But I would support an upper age limit, perhaps more like 80 than 55 though. I believe in the UK drivers have to have certain tests done after age 70 (eyesight, etc.? I don't know the details) - maybe these tests could be more comprehensive, and equivalent to a full driving test. Not sure it would be popular with older folk, but then none of these suggestions are popular with everyone.

As for the 4x4 issue raised by Guest,chris above - many 4x4s are aimed squarely at the yuppie market and would never be considered by a farmer or other 'essential' user, as they would be useless for working purposes. How did the likes of Land Rover manage before these vehicles became 'trendy' or 'cool' or whatever they call it these days? Obviously not all of them will survive, only the best will - but that's a good thing.