## 4 Results
Consequently, passenger evaluators established that the most critical part of the system is the service during their journey in the vehicle and not the other circumstances (before or after) of the travel. Passenger evaluators indicated in the first level that the development of \"Transport Quality C2\" is the element that needs to be improved the most as presented in Table 3, however, there were differences of preferences in the second and third rank, in which passenger side ranked \"Service Quality C1\" was the second most important issue, followed by \"Fare C4\" and in the last stage was \"Tractability C3\". It is also noticeable that transport or service quality gained greater significance compared to the other two general elements, thus, all initiations of the local municipality should focus on improving these two general items in the first stage. For level 2, the passengers evaluated the \"Safety of travel C23\" as the most important issue to be improved and after that they highlighted the \"Discounted tickets (C43)\" to be improved as shown in Table 5; accordingly, it can be concluded that to increase the demand on the public bus and make it sustainable the passengers priorities have to be considered. The element \"Discounted tickets (C43)\" gained the second most important position out of the 14 criteria in this level even though its respective upper level element \"fare\" gained only low weight, and in the calculation the role of the related upper level item is large (see Equation (7)). The element \"Info before travel (C32)\" gained the third position, while the \"info during travel C33\" gained the 11 th position, although they both belong to \"tractability C3\", so it is noticeable that in this case most of the passengers are familiar with the bus stop names and places, simultaneously the same passengers are suffering from the lack of the information before starting the journey, for example they require to be informed about time schedule changing, or route changing. \begin{table}
\begin{tabular}{c c c c} \hline
**Level** & **Criteria** & **Final Weight Score** & **Level Wise Ranking** \\ \hline \multirow{8}{*}{Level 3} & Distance to stop (C111) & 0.0101 & 10 \\  & Comfort of stops (C112) & 0.0209 & 6 \\  & Safety of stops (C113) & 0.0107 & 9 \\  & Need for transfer (C121) & 0.0200 & 7 \\  & Fit connection (C122) & 0.0300 & 2 \\  & Frequency of lines (C131) & 0.0356 & 1 \\  & Limited time of use (C132) & 0.0282 & 3 \\  & Journey time (C141) & 0.0148 & 8 \\  & Awaiting time (C142) & 0.0272 & 4 \\  & Time to reach stops (C143) & 0.0211 & 5 \\ \hline \end{tabular}
\end{table} 
Table 6: Priority ranking for level 3. \begin{table}
\begin{tabular}{c c c c} \hline
**Level** & **Criteria** & **Final Weight Score** & **Level Wise Ranking** \\ \hline \multirow{8}{*}{Level 2} & Approachability (C11) & 0.0417 & 14 \\  & Directness (C12) & 0.0500 & 10 \\  & Time availability (C13) & 0.0638 & 7 \\  & Speed (C14) & 0.0631 & 6 \\  & Reliability (C15) & 0.0443 & 13 \\  & Physical comfort (C21) & 0.0738 & 5 \\  & Mental comfort (C22) & 0.0878 & 4 \\  & Safety of travel (C23) & 0.1737 & 1 \\  & Perspicity (C31) & 0.0513 & 9 \\  & Info before travel (C32) & 0.0900 & 3 \\  & Info during travel (C33) & 0.0483 & 11 \\  & One-way tickets (C41) & 0.0445 & 12 \\  & Weekly/monthly tickets (42) & 0.0527 & 8 \\  & Discounted tickets (C43) & 0.1150 & 2 \\ \hline \end{tabular}
\end{table} 
Table 5: Priority ranking for level 2. In the level 3, as can be seen in Table 5, \"frequency of lines\" was the top priority for the passengers followed by \"Fit connection\" which means that the decision makers have to consider these elements when they improve the public bus system and network to raise the sustainability of urban transport. The element \"Frequency of lines (C131)\" gained the most important position out of the 10 criteria in this level even though its respective upper level element \"Time availability (C13)\" gained only low weight, and in the calculation, the role of the related upper level item is small (see Equation (7)).