blackn1ghtI’m surprised they don’t have the flat escalators - they’d be much better overall than using lifts.
JordanZI knew what you were talking about. The drawback to those is they take up a lot more space since the slope needs to be gentler. As well as what you mentioned about carts sliding back down. Doesn’t even have to be many carts. Just somebody not paying attention, kids messing around, or a heavy cart that an elderly could manage on flat but can’t keep stationary on even that gradual slope.
The trolleys have a wheel that magnetises to the escalator.
The wheels lock in, they can’t roll down the slope. We have them at a local supermarket near me, they can be full and you don’t need to hold the trolley at all.