Sinal de transporte Emoji
These icons are used on the objects of the transport infrastructure, such as railway stations, bus stations, airports. They indicate where you can pick your luggage, take a piss or show your passport to the customs officer (so that nobody confuses anything).
You might wonder, why? Because amateur tourists love to taste exquisite bitter cocktails before going on a trip. And that's how it starts... Trying to get your money from a coffee vending machine (instead of a bank machine), showing the customer something you were supposed to pull in the loo... and it's not a passport for sure.
In order to prevent such nonsense, we recommend you to learn these information signs in advance, using this wonderful set of emojis.