Use case

User can easily identify the bus stop ref number in South Korea.
Example 1: https://commons.wikimedia.org/wiki/File:202403_Seoul_Bus_Stop_Seobinggo_Station.jpg
Example 2: https://commons.wikimedia.org/wiki/File:Changdong_Station_East_Bus_Stop.JPG
In the case of Seoul, it consists of five-digit reference numbers(XX-XXX), and there are differences in the digit of reference numbers by region.