いつもこの駅で混むって英語でなんて言うの？

Packed- is a synonym for the word crowded. It can also mean uncomfortably close.

Usually it is said as a warning for your friend to make some room for the people trying to get on the train. You can also say it to a passenger nearby who doesn't know and is standing close to the doors. Keep a good distance from the doors so the crowd hurrying inside don't push you out of the way while trying to get on. passengers: are people who ride transportation vehicles like cars, buses or trains. Hope this helps!

There is nothing worse when on a journey than a crowded train. When trains are not crowded they are a very comfortable way to travel, but as soon as the trains become very busy they become 'uncomfortable' and it is hard to relax.

"Packed" is another way of saying "crowded" as well as "congested". "The word "packed" is more common in American slang, and "crowded" is a more formal and less used word.

To fill up' means that the storage capacity of something (in this case, a train) is reached. "Please fill up my cup with coffee."

When a train is crowded with passengers you can also call the train 'busy' or 'alot of passengers' if you are talking about a particular stop then you can say 'when we stop here' although you could also mention that stop or location to explain where

If the train gets crowded the at the Shibuya station, then you can refer to the new, crowded passengers as 'Shibuya passengers' because that is the place they came from. This does not mean that all the people live in Shibuya. It just means they all boarded the train from the Shibuya station. You can say this for any other city's train station. If you do not want to refer to the passengers, then you can state that the train becomes crowded the moment the trains stops at Shibuya.