This is a bus stop sign, which is usually set on the roadside, and is a sign for indicating the location of "bus stop".
Signs displayed on different platforms are different. Most platforms depict a pillar with a round sign and a square sign, and some platforms have only a single square sign or a single round sign. As for the patterns on the signs, there are various patterns, some are bus patterns, some are red, white and blue signs, some are timetables, and some show special signs of bus stations, with green "H" written on yellow circles, and some depict icons representing "stop". This emoji is usually used to represent bus stop signs and traffic signs, and can also represent bus stops.
