Ms. Jenna Darrah, Director of Field Research at Dunlap & Associates, Inc. holds an MS degree in Human Factors Psychology from North Carolina State University. Her research interests mostly fall in the field of impaired driving. She is currently co-Principal Investigator for the National Roadside Survey, Dunlap's largest ongoing project, assessing prevalence of alcohol- and drug-positive driving across the nation's roadways. She was heavily involved in a project assessing drug prevalence of severely and fatally injured road users presenting to trauma centers. The findings from this effort are guiding another ongoing project looking at the feasibility of developing a sentinel surveillance system for drug use among road users. Her involvement in other projects at Dunlap covers a broad array of topic areas, and she leads the efforts to prepare and execute the field data collection portion of projects.