St Petersburg orders trams with driverless capability
https://www.railwaygazette.com/light-rail-and-tram/st-petersburg-orders-trams-with-driverless-capability/60931.article
I thought driverless mode would be used for commercial use. But, the article says "potentially for depot use".
I wonder why it's only for depot use. If the function is just used in depot, advantages of driverless mode no longer exist.