Which factor is NOT important for roller coaster safety?

The factor that is not important for roller coaster safety is ride popularity. While ride popularity may influence the number of riders or the overall success of a theme park, it does not have a direct impact on the structural integrity and safety of the roller coaster itself. Safety in roller coaster operation is primarily ensured through regular inspections, proper maintenance, and adherence to safety protocols. These practices are crucial for identifying potential issues and ensuring that the ride operates safely for all guests. So, while popularity may be a consideration for the park's marketing strategy, it does not contribute to the essential safety measures required to protect riders.