you mean, the different milestones markings ? ....
zhap guo, chit guo, gau guo ? ... etc ? ...
damm .... that makes me a lao jiao ? ... 
not many youngster still remember e mileage or old bldg.
Like Yeo's factory, I know it's Opp KAP. 
Tat said, some of my bus rides are pretty epic.