What is the maximum overspeed on a moving walk?

The maximum overspeed on a moving walk is generally set at 20%. This standard is crucial for ensuring passenger safety and comfort, as it limits the speed discrepancy that can occur during normal operation. Moving walks, often found in places like airports or shopping malls, are designed to enhance pedestrian flow, and an overspeed limit helps maintain control and reduces the risk of accidents or injuries if the system encounters a sudden issue.

Setting the maximum overspeed at 20% allows the system to operate efficiently while still adhering to safety standards. Exceeding this limit could lead to a range of mechanical failures, discomfort for users, or increased chances of falls and missteps. Thus, the selection of 20% as the correct answer reflects industry practices for ensuring that the operation of moving walks remains within safe operational parameters.