I'm beginning to think that other drivers' drifting has nothing to do with me.

I've been driving too much lately and I can't get over how many people just drift into the oncoming lane for no reason. It was bad enough one day when I was in my pickup and the guy in front of me was doing it. Then I noticed in my rear view mirror that the driver behind me was doing it too. It was a straight road. But it really annoys me to be going around a corner and be met by somebody coming toward me in my lane, even of only a little bit. It's been a daily experience. For some reason I don't notice it when I ride my bicycle, perhaps because nobody is around me for long enough.