like overlapping pieces of a puzzle.
The more useful overlap you have, the less likely a vehicle is to suddenly disappear from one viewing area and remain hidden somewhere else.
That’s why mirror positioning matters.
But Don’t Forget to Actually Look
Even with carefully adjusted mirrors, you shouldn’t treat them as a guarantee that nothing is there.
NHTSA specifically advises drivers to take a moment to look over their shoulder before changing lanes, even with mirror settings designed to reduce blind spots.
That’s probably the most important thing I learned
