To benchmark the performance of the Bus System (BS), Performance Measurement Systems (PMSs) should be used. In that regard, this contribution reviews the advancement of the standard PMSs used globally: Key Performance Indicators (KPIs). This research will further identify the BS that has a record of effective performance throughout their operations. With reference from the experiences in benchmarking, we have presented a literature review of KPIs and evaluated inputs to confirm that KPIs are a standardized approach used to compare and identify the performances of best practices for BS participation. The practical experience with the systems has potentially identified various critical issues in collecting comparable and consistent data. Dealing with these issues, giving the comparable information and undertaking essential study to comprehend and point out the basis for effective performance is considered a process which provides lessons for considerable benchmarking practices. This paper further evaluates the rules of the benchmarking processes, the PMSs of the BS, the overall challenges faced when collecting data and lastly, the findings of the benchmarking practice.