This font is designed for 8x8 led matrix display (max7219) with as small chars as possible (3x5 points). My idea was create small font for my weather station integrated in my Home Assistant as Esp Home based project, because default font is too beefy and cover whole display with few chars.
LED lettering used by PTV (Public Transport Victoria) on the SmartBus boards for "how long until the next bus" information. I ride the bus to work each day, so these are pretty familiar, but I still had to guess some of them. I've left out some glyphs where they're just not useful (e.g. comma or quotation marks).