Motorcycle fatalities is the total number of motorcyclists and/or their passengers killed in a traffic crash on Florida's public roads within 30 days of the crash. The measure, motorcycle serious injuries, is the total number of incapacitating injuries sustained by motorcyclists and/or their passengers in a traffic crash on Florida's public roads.

• Motorcycle: A motor vehicle with a seat or saddle for the driver's use, traveling with no more than three wheels in contact with the ground, excluding tractors and Mopeds.
• Number of fatalities: Total number of people killed on roadways as a direct result of a traffic crash within thirty days of the crash occurrence.
• Number of serious injuries: Number of disabling/incapacitating injuries (such as broken bones, severed limbs, etc.) from traffic crashes that prevent the injured individuals from engaging in normal activities and that usually require hospitalization and transport to a medical facility.