**3. Data Collection and Analysis**

### *3.1. Data Collection*

Data collection, which had two steps, was performed for the objective data from the vehicle data collectors (vehicle sensors, the equipment installed in the vehicle to collect the data), for charging records and for other car parameters. The steps were as follows:

(1) The first stage of the test was mainly concerned with dynamic data (and various indicators of the vehicle) collected by the vehicle data collectors or determined from dashboard readings while the vehicle was in motion. The dynamic data included driving distance and power consumption.

(2) The second stage of operation test was concerned with static data collection. This included charging and maintenance records, which themselves included charging duration, charging frequency, failure frequency and failure duration.

A data table was completed by the drivers every day they participated in the test and recorded for each bus separately. Table 4 shows an example.


**Table 4.** Example of Data Collection Table.

After two months of testing, the data was summarized as shown in Table 5. Because of the confidential business information involved, code names are used for the buses. For example, the code name "V8-1" refers to buses from brand 1 in Group A (about 8 m long) and "V10-1" refers to buses from brand 1 in Group B (about 10 m long).


**Table 5.** Data Summary Table.

The various indicators and their data for the road test operation are summarized in Tables 6 and 7.

**Table 6.** Indicator Data Collected for Group A.



