What condition could lead to the traction of steps slipping during operation?

The condition that could lead to the traction of steps slipping during operation is excessive wear or damage to the step drive system. The step drive system is crucial in ensuring that the escalator steps move smoothly and consistently. When components in this system begin to show signs of excessive wear or sustain damage, their ability to grip and propel the steps effectively diminishes. This can lead to inadequate traction, causing the steps to slip during operation.

In this context, regular maintenance, proper lubrication, and updated control systems play vital roles in keeping an escalator functioning efficiently. However, they do not directly cause the steps to slip. Regular maintenance ensures that all components, including the step drive system, are in good condition. Proper lubrication reduces friction and promotes efficient movement, while updated control systems enhance overall operation but don’t directly affect traction. Maintaining the integrity of the step drive system is essential to prevent slippage and ensure passenger safety.