This has probably come up before but do you think it is taught or necessary to look over your shoulder to check blindspot when changing lanes on the motorway?
I just need to add an edit. I’m specifically referring to looking over your shoulder on a motorway. Checking mirrors and blindspot is not under question
How can you tell when you’re in another driver’s blind spot?
It’s easier with more modern cars, because you can see the lights on a side mirror light up.
In general if you are less than a car length behind someone, until you can see them is not a great place to be.
I mean you can’t stay out of their “exact” blind spot, but vehicles aren’t that different. The blind spot is typically in the range of behind the driver’s side door to a few feet behind the rear bumper.
If you’re on their left, can you see their face in their side mirror. If you’re on their right, slow down or speed up so no part of your vehicle is along side theirs.