If you are wearing a lap and shoulder harness your chances of surviving a collision are how much better than someone who is not belted in?

Wearing a lap and shoulder harness significantly increases your chances of surviving a collision. Studies indicate that seat belts can reduce the risk of fatal injury by about 45% for front-seat passengers and by up to 60% for those in the rear seats. This is primarily due to the harness's ability to restrain occupants, preventing them from being ejected or colliding with the vehicle's interior. Therefore, being buckled in greatly enhances overall safety during a crash.