Study on the Influence of Drivers' Physiological Characteristics of Urban Bus Stop

Bus driver is the only operator of bus, and bus stop is a driving stage in which bus differs from other social vehicles. In this paper, bus driver’s physiological characteristics in the process of bus stop-and-go were studied which were analyzed by theoretical analysis, comparison and significant difference analysis to obtain the changes of drivers’ physiological and psychological characteristics and to provide the guide basis for drivers’ fatigue and driving safety analysis. The real vehicle test was designed and put into effect, and the bus drivers’ physical data were obtained by using physiological tester. Then the comparison analysis of bus drivers’ physiological data such as BSA and HRV between the real vehicle test and the natural state was carried out. The results showed that there were significant differences in the changes of BSA and HRV between the real vehicle test and the natural state. When the driver was under natural state the characterization parameters of BSA were merely fluctuating with time. The stable value of ECG, dz/dt and GSC was around 0.35 V, 0.3 Ω and 0.018 V respectively and changed very little. The characterization parameters of HRV changed little. Heart rate stabilized at 70 beats/min and breathing rate stabilized at 17.5 times/min; when the vehicle decelerated into station, driver’s ECG declined from 0.4 V to 0.25 V, and dz/dt increased from 0 Ω to 3.5 Ω, at the same time, heart rate rose to 98 beats/min, which had significantly fluctuations comparing with the natural state; when the vehicle stopped, driver’s ECG of the driver increased from 0.3 V to 0.5 V, the dz/dt declined from 0.5 Ω to 0.35 Ω, and the respiration rate also reduced to 14.7 times/min, which had significantly fluctuations comparing with the natural state; When the vehicle accelerated to bus stop, the dz/dt increased from 0.3 Ω to 0.41 Ω. The change threshold of GSC was 0.09 V, which was much higher than the stable value under natural state, and then GSC decreased to 0.17 V.