arrr, scary 
Some drivers seem to have no idea that cyclists are balanced on just 2 wheels protected by nothing but their wits. The faster and straighter you ride the more likely you are to be treated like another car.
My first thought was that you might want to keep a little extra leeway on your right, so you have somewhere to fall. If I'm a fan of both actively helping traffic pass AND purposely blocking the lane until it's safe to pass. But even when letting cars pass I try to keep a little extra space on my right. And I admit to introducing an unnecessary wobble to my steering if I have the feeling someone is really pushing me...
Winter riding is much less about badassery and much more about bundle-uppery. - malkin
1995 Kona Cinder Cone commuterFrankenbike/Selle Italia SLR Lady Gel Flow
2008 white Nakamura Summit Custom mtb/Terry Falcon X
2000 Schwinn Fastback Comp road bike/Specialized Jett