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2. Space Efficiency Traditional crowd management solutions, such as fixed barriers, can be cumbersome and take up significant space. Retractable belt queue bollards are space-efficient as they can be deployed only when necessary. Once the event or peak hours are over, they can be retracted, allowing for free movement and maximum utilization of space.
retractable belt queue bollard

The location of a sewer manhole must be carefully considered to ensure that the drainage system is effective and easy to maintain.[14][15] According to design standards, the distance between two manholes is typically between 7 and 20 meters, depending on the specific characteristics of the project.[16][17] In cities, the distance is 20 meters per manhole,[18] while in industrial or commercial settings it is 10-15 meters per manhole.[19][20] The distance between manholes in homes or restaurants is typically 7-10 meters.