Well of course i do not know the answer to this joke but it got me thinking about travel.
last week I was due to see my parents in Peterborough and felt too ill to drive so I went by train.
Interestingly although I did not train it for any environmental reasons I found that it had a number of advantages over driving
1. It was about the same price as the cost of petrol for the journey
2. It was about half and hour quicker
3. I was able to knit which i always find awkward when driving even with an automatic. ( this IS a joke)
By the way, a good place to buy wool in Norwich is Norfolk Yarn on Aylsham road.