A review of effectiveness studies and suggestions for State programs with regard to safety belt usage are presented. The National Highway Traffic Safety Administration (NHTSA) estimates that lap belts are 40% effective in preventing crash related deaths, while lap/shoulder combinations are 60% effective. With regard to injuries, the NHTSA estimates that lap belts are 31% effective in preventing moderate toeritical injuries, while lap/shoulder combinations are 57% effective.
Abstract