Man of Honour
I can change a wheel myself and anybody who drives should be able to. It's not exactly difficult. The exception would be if the car didn't have a spare and only had a can of green gunk and a compressor which is too often the case these days but I would be ok to do that as well. Luckily the previous owner of my car opted for a spare wheel as a extra. As I value my life I probably wouldn't do it on a motorway unless it was very very quiet.