Liz Bonnin looks at the moving blocks that automated trains, such as London's Docklands Light Railway use to keep their system running smoothly at full capacity.
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![](https://i.ytimg.com/vi/a52ZSCIAoRk/maxresdefault.jpg)
Liz Bonnin looks at the moving blocks that automated trains, such as London's Docklands Light Railway use to keep their system running smoothly at full capacity.
Subscribe for more awesome science - [ Ссылка ]
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