Pediatric transport harness systems for an emergency cot (1) including a harness support structure (30), a stabilizing strap (130), guide straps (50a, 50b), and a harness restraint (70). The harness restraint is slidably engaged with the guide straps and is continuously positionable and secureable along the guide straps. Methods of securing a pediatric patient to the emergency cot using the pediatric transport harness system.