Dr. Grugle is a human factors expert who specializes in investigating fatigue, sleep deprivation, and drowsy driving as well as distracted driving, looming, visibility/conspicuity, and driver behavior. Dr. Grugle has conducted hundreds of investigations on cases involving these issues as well as cases involving advanced driver assistance systems (forward collision warning, lane departure warning), roadway design (expectancy and positive guidance), and work zone safety.

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.