I love the badges Transport for London gives to passengers.
One of them says, “Please offer me a seat,” and another for expecting mothers says, “Baby on board”.
The first is an excellent way for someone to communicate their need for a seat without having to reveal private or personal information. The second is a great way for soon-to-be mothers to guarantee they’ll have a seat on public transport if they want it.
I love seeing how people immediately recognise and vacate seats when someone with a badge hops aboard. It’s an example of a small design decision that is 1) universally recognised among London commuters, and 2) is an effective way to create a more inclusive public transport experience.