The largest blind spot on most vehicles is typically located behind the vehicle, particularly on the sides. This area is commonly referred to as the "rear blind spot" or the "rear quarter blind spot". The blind spot can vary in size depending on the size and shape of the vehicle, as well as the driver's position and posture.
To minimize the risk of accidents caused by blind spots, drivers should always adjust their side mirrors properly, use their rearview mirror, and perform shoulder checks before changing lanes or making turns. Additionally, having a backup camera or sensors can provide additional assistance when reversing the vehicle.