Meaning
A bus seen from the front, heading straight towards you, with its headlights and destination sign visible. It stands for a bus that is arriving.
Use it to say your bus is here, that you are on your way, or to warn that something is coming: โ๐ finally here, see you in 15โ. It feels more dynamic than the side-on ๐. Pair with โฑ๏ธ for timing or ๐ when you need to run for it.