Core Viewpoint - Multiple metro systems in China are halting the practice of "left walk, right stand" on escalators, emphasizing safety by encouraging passengers to "stand firm and hold on" instead [1][2]. Group 1: Safety Concerns - The shift from "left walk, right stand" to "stand firm and hold on" is primarily driven by safety concerns, as walking on escalators can lead to accidents such as falls [1][2]. - Experts highlight that the design of escalators, which often have a higher step height than regular stairs, increases the risk of accidents when passengers walk or run [2][3]. - Increased passenger flow during peak hours adds to the pressure on escalators, making standing side by side more efficient for capacity utilization [2]. Group 2: Maintenance Issues - Long-term practice of "left walk, right stand" has been found to cause uneven wear on escalator components, leading to higher maintenance costs and potential safety hazards [2]. - The asymmetric loading on escalator chains due to this practice can result in decreased comfort and increased maintenance requirements [2]. Group 3: Public Awareness and Education - Continuous public education and awareness campaigns are essential for changing established habits regarding escalator use [3]. - Various metro systems are implementing measures such as visual and audio reminders to promote safe escalator usage, including prohibiting running and walking [3]. - Industry professionals recommend using multiple channels for safety messaging and conducting regular safety awareness events to educate passengers about escalator safety [3].