Blind spots are areas around your vehicle that you cannot see in your mirrors. Mirrors can only reflect certain sections of the road around you, no matter how much you adjust them.
It is possible for another car to be right next to you without you knowing about it, simply because that car is in one of your blind spots.
The size of your vehicle’s blind spots often depends on the size of your vehicle. Larger vehicles tend to have larger blind spots, especially if your car is higher off the ground than the other vehicles around yours.
However, it is harder for large vehicles to hide in a blind spot. That means these vehicles are likely to be easier to see. On the other hand, pedestrians and motorcyclists can be harder to see when they are in a blind spot.