# The Messy Science of Escalator Etiquette Source: https://www.youtube.com/watch?v=as8s6QQcjp0 Recap page: https://rapidrecap.app/video/as8s6QQcjp0 Generated: 2026-01-29T01:04:10.716+00:00 --- ## Quick Overview The optimal strategy for escalator use to maximize throughput is to have passengers stand on one side (usually the left in right-hand-stand regions) and walk on the other, as forcing people to stand on both sides reduces capacity, especially on shorter escalators, though for very tall escalators like those in London Underground, standing on both sides might be slightly more efficient than standing only. **Key Points:** - The 2002 study on London Underground escalators found that allowing walking on one side (left) while standing on the other (right) resulted in a capacity of 66 people per minute (ppm) on the walking side, compared to 54 ppm for standing only. - The same study concluded that forcing people to stand on both sides of an escalator is not recommended because it is difficult to enforce and only advantageous on very long escalators (taller than 60 feet/18 meters). - In cities like the US, Canada, China, UK, France, and parts of Japan, the standard etiquette is to stand on the right and walk on the left. - In other places like Australia and other parts of Japan, the etiquette is reversed: stand on the left and walk on the right. - A taller escalator (like the 200ft one at Angel Station, ~60 meters) benefits less from walking, as the travel time minimizes the impact of walking speed. - Studies show that having people stand on both sides reduces capacity compared to the optimized 'stand left, walk right' approach, as walking passengers leave a two-step gap in front of them. - The video promotes Wildgrain, a subscription service for fresh-baked bread, croissants, and cookies, offering $30 off the first box plus free croissants for life with code HAI. ![Screenshot at 0:05: The narrator illustrates the common social conflict where a person labeled 'You' encounters a person labeled 'Bozo' standing on the walking side of an escalator, blocking movement.](https://ss.rapidrecap.app/screens/as8s6QQcjp0/00-00-05.jpg) **Context:** This video explores the widely debated etiquette of whether people should stand or walk on escalators, analyzing the impact on passenger flow and overall system capacity. It references specific academic studies, notably a 2002 paper on the London Underground, which modeled passenger movement based on personal space (the 'human ellipse') and found that mixing standing and walking passengers on opposite sides optimizes throughput, while universal standing or universal walking reduces efficiency. ## Detailed Analysis The video investigates the efficiency of escalator etiquette, concluding that the optimal flow is achieved when passengers stand on one side and walk on the other, although this ideal is geographically dependent. The video references a 2002 study, "Estimation of Capacity of Escalators in London Underground" by Davis and Dutta, which found that on a normal speed escalator (43.2 meters/minute), the standing side capacity was 54 ppm (assuming 50% usage of steps), while the walking side (assuming a walking speed of 36 meters/minute and 33% step usage for walking) achieved 66 ppm. The total capacity was approximately 120 ppm. This suggests that allowing walking on one side significantly increases throughput compared to everyone standing (theoretical maximum of 216 ppm, rarely achieved). The study explicitly recommends against persuading passengers to stand on both sides, stating such a policy would be difficult to enforce and only advantageous on very long escalators (taller than 60 feet/18 meters). The video contrasts etiquette globally: the US, Canada, China, and the UK generally stand right/walk left, while Australia and other parts of Japan stand left/walk right. On very long escalators (like the 200ft one at London's Angel Station), the capacity benefit of walking diminishes. The video concludes by promoting Wildgrain, a food subscription service, providing a discount code HAI. ### Escalator Etiquette Differences - US/Canada/China/UK (Stand Right, Walk Left) - Australia/Parts of Japan (Stand Left, Walk Right) - Historical London (Stand Right, Walk Left, but later discouraged standing) ### Capacity Analysis (2002 Study) - Standing side capacity = 54 ppm (assuming 50% step usage) - Walking side capacity = 66 ppm (based on escalator speed v=43.2 m/min, walking speed u=36 m/min) - Total capacity with mixed flow is higher than all-standing or all-walking scenarios. ### The Role of Escalator Height - For short escalators (under 60ft/18m), walking significantly boosts capacity; for very tall ones (like Angel Station at 200ft/~60m), the difference is less pronounced. ### Recommendations from Research - Do not force people to stand on both sides; this policy is hard to enforce and only theoretically beneficial on extremely long escalators. ### Sponsor Message - Promotion for Wildgrain, a subscription box for bread, pasta, and pastry, offering $30 off the first box plus free croissants for life with code HAI. ![Screenshot at 0:00: An instructor figure with a logo for a head presents a concept to an audience in a classroom setting.](https://ss.rapidrecap.app/screens/as8s6QQcjp0/00-00-00.jpg) ![Screenshot at 0:04: An animated graphic shows a two-lane escalator where one side is marked for standing \('You' is on the walking side\) and the other for walking.](https://ss.rapidrecap.app/screens/as8s6QQcjp0/00-00-04.jpg) ![Screenshot at 0:39: A split screen contrasts the two main escalator rules: 'Stand' on one side \(red\) vs. 'Walk' \(green\) on the other, highlighting the global divide.](https://ss.rapidrecap.app/screens/as8s6QQcjp0/00-00-39.jpg) ![Screenshot at 1:54: A long shot of the Canary Wharf escalators in London, showcasing their massive length.](https://ss.rapidrecap.app/screens/as8s6QQcjp0/00-01-54.jpg) ![Screenshot at 2:28: A diagram from research paper showing the difference in passenger packing density when standing side-by-side versus one person per step.](https://ss.rapidrecap.app/screens/as8s6QQcjp0/00-02-28.jpg)