Abstract
This report is a case study presenting data from in-depth investigations of 167 motor vehicle crashes involving lap/shoulder-belted occupants. The accidents and the crashes had to meet specific criteria, and represent a wide range of accident configuration and severity. Volume 1 (NTSB/SS-88/02) of the study describes the good crash protection provided by lap/shoulder belts, residual injuries sustained, degraded protection provided by any misused lap/shoulder belts (ie, misrouted, excess slack, reclining seat), and use of the three-point belt by children and pregnant women. Volume 2 (NTSB/SS-88/03) contains the 167 case summaries that provide the data discussed in Volume 1. (Author/publisher)