Interesting Tom, so rather than use someones driveway to turn the car, you are meant to try and turn the car around in the confines of the gutter/roadway which would seem inherently more difficult/unsafe, is there any reason for this other than trespassing on the bit of concrete someone else has paid for? are 3 point turns legal anyway? Cant say they asked me to do one when I did my driving tests.
I have no idea on the legal side, or the reasoning behind it. All I was told by my driving instructor is NOT to use a driveway or joining street to make a 3-point turn, it has to be gutter to gutter. I assume 3-point turns are legal as it one of the main things they go over you with for the test.
And I was made to do a 3-point turn, and a reverse parrelel (sp) park on my test, my understanding is you must show you are capable of completing 2 of the 3 low speed manouvers, hill start, reverse park, and a 3-point turn, which one they make you do is up to them.