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Macrophage87 t1_is258wp wrote

In most cases, they do so to inspect and clean the metro. They have teams to identify and clear out major trash and 'fluids'. Also, to note anything suspicious. I accidently boarded one when it went out of service and that's what they told me was why they did it.

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perkinwarbeck OP t1_is26wya wrote

It isn't long enough for them to do any kind of inspection or cleaning. It's really only 30 seconds to a minute.

Maybe the driver inspects each car via camera from the driver's seat and then puts it back in service? Then if the driver saw something, they could clean it before putting it back in service.

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HauntingHarmonie t1_is29nrx wrote

They definitely do inspections at Shady Grove. There's a whole host of metro workers that walk through the cars before it goes back into service.

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MysticsWonTheFinals t1_is2jewj wrote

Maybe you caught them when they were running ahead of schedule and had to delay for a minute

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