Poor maintenance can lead to mechanical failures, but they can also happen over time. Poor maintenance can cause cables to snap or restraints to fail. Rides can also suddenly stop due to mechanical failure. These rides can be in operation for more than 12 hours per day so wear and tear is possible.

Operators are responsible for setting and managing the controls of many amusement park rides. Most of these accidents occur at traveling fairs and carnivals. Operators could be under the influence of drugs or alcohol, falling asleep, getting distracted or making other serious mistakes.

Fixed location amusement parks (Disney World) are big business. They often have standards that require employees to be more qualified for operation.

All instructions and guidelines must be followed by all passengers on rides at amusement parks. Neglecting to follow these instructions or precautions can lead to serious injury. A passenger might be unable to sit straight in a chair, unlatch safety bars, or restraints properly.

It may take many rides before the problem is apparent. Some park owners might open their rides to the public without testing for safety. A ride that is unsafe or poorly designed can cause serious injuries.

Amusement parks can have other accidents than those that occur on the ride. To access rides, visitors will often need to use ramps, platforms or stairs. Slips, trips and falls can occur if these access points are not properly cleaned, wet, or full of debris.