Cars are very comfortable. You sit down on a nice, comfortable seat which on some larger cars is closer to an armchair (both in size and level of comfort), and if you are a little tired, the chance of falling asleep at the wheel is very high.
However, we had honestly never heard about people falling asleep while operating two-wheeled vehicles - scooters, for instance. The woman in this video is just riding her scooter along, when all of a sudden she starts slowly drifting to the left of the (only) lane and into oncoming traffic.
She narrowly misses hitting an 18-wheeler head on, and violently grazes its side, before falling back onto her right side. After the crash, one driver stops and gets her off the tarmac and onto a curb - she seems OK, but had she drifted into the other lane but a few seconds earlier, it would have been all over.
Google News