# Coordinated Control Method of Bus Signal Priority and Speed Adjustment Based on Stop-Skipping
###### Abstract  
There is an inherent coupling relationship between the time when buses arrive at the station and the time when they arrive the intersection, and it is essential to study the relationship as a whole to maximize the benefits of company operations and passenger services. In this study, a coordinated control method of signal priority and speed regulation in the stop-skipping mode at peak hours is proposed. First, the decision result of stop-skipping is obtained based on the historical passenger flow data. On this basis, the signal-priority decision is made for each vehicle in combination with the signal period and the arrival time of the intersection, and coordinated control is carried out in combination with the speed adjustment. The result of the genetic algorithm shows that cooperative control and prevention can minimize the passenger delay time and enterprise operation cost. The conclusions obtained in this research lay a theoretical foundation for company operation and signal-priority triggering mechanism. stop-skipping; coordinated control method; signal priority; speed adjustment; genetic algorithm +
Footnote †: journal: Medical  
holding and stop-skipping. [PERSON] et al. [18] verified that the combined strategy is better than a single strategy in saving waiting time through global positioning system (GPS) technology and simulation tests. In order to ensure that buses pass through the intersection, some scholars have proposed an intersection control method combined with speed guidance to provide signal priority for buses. [PERSON] et al. [19] developed a dynamic headway control method for high-frequency routes with bus lanes. The results show that the proposed method can reduce the bus distance bias for all survey periods. [PERSON] et al. [20] proposed a new method to optimize bus stop waiting time and give priority to buses at segregated intersections. Finally, the potential of the proposed method to be applied to the bus priority control system is demonstrated. [PERSON] et al. [21] proposed to combine the driver advisory system (DAS) with signal-priority control request, and the results showed that the travel time can be significantly reduced compared with using BSP alone. In order to solve the problem of delay at intersections and give more road priority, some scholars have proposed a signal-priority control method for dynamic bus lanes [22; 23]. On this basis, [PERSON] and [PERSON] [24] proposed a cellular transport model for dynamic bus lanes, which was effectively applied in Austin. [PERSON] et al. [25] proposed a variable bus approach design with a bus guidance and priority control model, which can reduce the delays of through and left-turn buses and provide optimal signal priority for buses. In addition, some scholars have undertaken the following research combining signal priority and holding. [PERSON] et al. [26] proposed a combination strategy of holding, speed adjustment and signal priority, and verified the effectiveness of the combination strategy in Quebec City, Canada. [PERSON] et al. [27] proposed a combined control strategy of holding and signal priority to minimize the total delay of passengers, and verified the effectiveness of the proposed strategy in Blumenau, Santa Catarina, Brazil. To sum up, the research results of the combined dynamic scheduling strategy are rich, but there is still a gap in the combined research of stop-skipping and signal priority in peak hours. At the same time, the signal priority of the intersection is closely related to the bus arrival time, so it is necessary to conduct an overall study of the station and intersection. This study combines speed adjustment and signal priority for coordinated control in the bus stop-skipping mode to fill the gap in this field. This research mainly focuses on the following three aspects:  
1. Combining the passenger flow of the station at the peak of the line to make the decision of stop-skipping. 2.