Abstract
During October 1974, shoulder belt usage was observed for 21.359 drivers in the population at risk in North Carolina. Information was recorded on shoulder belt usage of driver, approximate age and sex of driver, and license plate number of vehicle. Results show an overall shoulder belt usage rate of 10.6% in 1974 and 7.9% in 1976. As expected, usage rates were highest for drivers of newer (past-1973) and smaller sized cars.