The areas outside your field of vision and not visible in rear-view mirrors are commonly called:

Study for the Just Drive Test. Boost your driving knowledge with multiple choice questions and detailed explanations. Prepare for success!

Blind spots are the areas outside your field of vision that aren’t visible in your rear-view and side mirrors. These zones exist because the combination of where your eyes sit in the car and the angle of the mirrors doesn’t cover every angle, so another vehicle can hide from view unless you look over your shoulder or use your mirrors correctly. Being aware of where blind spots typically lie helps you make safer lane changes and merges, especially by giving a quick shoulder check before moving. Some cars have blind-spot warning systems to alert you when a vehicle enters that area. The other terms don’t fit because they aren’t the standard name for unseeable areas around a vehicle.