There are approximately 240,000 highway-rail grade crossings in the United States. High crash frequencies at these locations have led to continuted research in safety modeling.Existing crash models at highway-rail grade crossings can be classified into two categories: accident frequency prediction models; and driver injury severity models. The majority of these studies have focused on the fist category. Few studies have focused on the severities of injuries to motor vehicle driver at highway-rail grade crossings. The objective of this study was to determine the contributing factors that influence the severity of driver injuries in accidents at highway-rail grade crossings. A marginal analysis was also conducted to quantitatively interpret the marginal effects of contributing factors on each severity level for the highway driver.