It is well known that motorcycles have a higher death and injury rate than automobiles that are human driven, I expect self driving cars to increase this differential? Will they ever make self driving motorcycles to allow them to catch up? It may never be possible to make motorcycles as safe as self driven automobiles. Will we tolerate the deaths and injuries in exchange for greater traffic density? I think not. I have driven in Taiwan and other Asian countries with huge numbers of motorscooters and motorcycles, and I was amazed at the huge number of young men on crutches and with limps. I asked my taxi driver why this was, and he said that people's knees stick out on scooters and motorcycles, injured knees are the largest injury that people suffer when they have an accident. The logic is clear.