Some drivers don't watch I am sure, but the simple truth is Bicyclists are careless! I drove a delivery truck for nearly a year, and I observed some bicyclists taking pretty stupid chances just to prove a point. Most drivers are aware of 100 % of everything on the road. If you are where your supposed to be, and visible, and being respectful of the motorist as well, and aware of what they are doing. They will see you, and there will be a respectful exchange of right of way where apporpriate.