HUH?
Unless you have sport bike mirrors on a Semitruck… you dont need to turn your head a lick to change lanes without issue.
I look in my rear view and pay attention to people coming up behind me. Always being aware of the traffic around your car. My rear view I can see out the back window and most of the back side windows, my side view i position to see 90% of the next lanes. Its called paying attention, and properly setting and using the mirrors on the car. I drive 70 miles a day, in rushhour to and from albany, I see what you mean though. but again it all boils down to people who dont pay attention. Also it helps that I am driving at a faster pace than anyone else. But still merging and shit is easy when you know how to read your mirror and understand the distances from your ass end to an object at all times. AKA not being a failure at driving a car.
Back up cams. LOL