## 4 Numerical Analysis and Simulation Results  
### Sampling  
In-street interviews were conducted with taxi drivers in Hong Kong. There are around 40,000 taxi drivers in Hong Kong, and we randomly selected 250 taxi drivers. Among the 250 respondents, 97.6% (244 out of 250) are male, and 2.4% (6 out of 250) are female. Regarding age and experience, 46.4% (116 out of 250) are between 51 and 60 years old, 44.8% (112 out of 250) are more than 60 years old; 84% (210 out 250) of interviewees have more than 10 years of experience in driving taxis, which means 84% of them are familiar with this industry, and their opinions are significant to the implementation and development of electric taxis. For the daily travel distance of a taxi driver, 25.6% (64 out of 250) stated that their travel distance is around 200 km, 18.4% (46 out of 250) stated that it is around 250 km, and 13.6% (34 out of 250) stated that it is around 180 km. Based on the survey results, we can assume that the average daily travel distance of a taxi driver would be from 180 to 250 km. As to the suggestion for the ideal travel distance of electric taxis, 26.1% (65 out of 250) suggested around 300 km, 23.3% (58 out of 250) suggested 400 km, and 15.7% (39 out of 250) suggested 350 km as the ideal travel distance of electric taxis. As a result, more than 65% agreed that the ideal travel distance of an electric taxi would be at least 300 km. As to the number of times of charging, 99.2% (247 out of 250) would accept charging only one time in their shift. Regarding the duration of charging electric taxis, 39% (97 out \begin{table}
\begin{tabular}{c c c c} \hline \hline
**Group** & **Variables** & **Notation** & \begin{tabular}{c} **Related Questions in the Survey** \\ \end{tabular} \\ \hline \multirow{4}{*}{\begin{tabular}{c} The anxiety of \\ cruise range \\ \end{tabular} } & Charging frequency & a & \begin{tabular}{c} How many times would you \\ accept to charge your car for \\ a full-day operation? \\ \end{tabular} \\ \cline{2-4}  & Daily driving mileage & b & \begin{tabular}{c} How many kilometers does \\ the taxi driver usually travel \\ per day? \\ \end{tabular} \\ \cline{2-4}  & Preferred cruise range & c & \begin{tabular}{c} What is the preferred cruise \\ range for electric taxi \\ drivers? \\ \end{tabular} \\ \hline \multirow{4}{*}{\begin{tabular}{c} The convenience \\ of charging \\ facilities \\ \end{tabular} } & Cruise time to arrive & \begin{tabular}{c} What is the acceptable \\ driving time to the closest \\ charging stations? \\ \end{tabular} \\ \cline{2-4}  & Locations of charging & e & \
\begin{tabular}{c} Where should new charging \\ facilities be installed? \\ \end{tabular} \\ \hline \multirow{4}{*}{Incentives} & Subsidy & f &
\begin{tabular}{c} What is the acceptable \\ financial subsidy for electric \\ taxi purchases and for \\ transport operation? \\ \end{tabular} \\ \cline{2-4}  & & & \\ \hline \hline \end{tabular}
\end{table} 
Table 1: Variables affecting driving behavior and operational preferences of taxi drivers. of 250) would only accept 5 min as the charging duration, 25.3% (63 out of 250) would accept 10 min, and 17.7% (44 out of 250) would accept 15 min as the charging duration. The above results revealed that most of the interviewees are not willing to waste too much time charging electric taxis, and the ideal charging plan for taxi drivers is to charge only one time during their shift, for a maximum of 15 min each time. For the incentives of using electric taxis, some of them mentioned that they are not able to purchase a taxi, and they would rather choose to receive an operating subsidy. Among 250 responses, 82.8% would like to receive an operating subsidy, while only 17.2% would like to receive subsidies upon purchase of an electric taxi.