Dr. Grugle is a human factors expert who specializes in cases involving human performance and behavior, particularly in motor vehicle collisions. Her areas of specialization include fatigue, sleep deprivation, and drowsy driving, as well as distracted driving, looming, visibility/conspicuity, and driver actions. Dr. Grugle has conducted hundreds of forensic investigations on cases involving these issues as well as cases involving roadway design (expectancy and positive guidance), and driver assistance technologies (forward collision warning, lane departure warning).

Dr. Grugle is a Board-Certified Human Factors Professional (CHFP) with over 20 years of academic, research, and industry experience in human factors engineering. She was awarded competitive human factors research grants from the National Science Foundation, the Ohio Department of Transportation, and the Cleveland State University Transportation Center and her research has been published in national and international peer-reviewed journals.

Dr. Grugle conducts investigations for both plaintiff and defense counsel and has testified in both state and federal courts.