As of 2014, roller coaster-related tragedies account for the deaths of four people each year in the United States. This includes deaths caused by roller coaster crashes, medical-condition complications and complications from injuries acquired while riding roller coasters. This number also includes employees whose deaths were caused by roller coasters.
The chance of acquiring a fatal injury at a theme park is 1 in 1.5 billion, as of 2014. This number is extremely low due in part to safety measures such as daily inspections of rides and proper restraint systems. The restraint systems keep riders safely positioned throughout the ride and include either an over-the-shoulder harness system or a lap belt. Each roller coaster also has its own age, weight and health restrictions that should be followed to ensure individual safety.