Abstract
Providing convenient transit services at reasonable cost is important for transit agencies. Timed transfers that schedule vehicles from various routes to arrive at some transfer stations simultaneously (or nearly so) can significantly reduce wait times in transit networks, while stochastic passenger flows and complex operating environments may reduce this improvement. Although transit priority methods have been applied in some high-density cities, operating delays may cause priority failures. This paper proposes a resilient schedule coordination method for a bus transit corridor, which analyzes link travel time, passenger loading delay, and priority signal intersection delay. It maximizes resilience based on realistic passenger flow volume, whether or not transit priority is provided. The data accuracy and result validity are improved with automatically collected data from multiple bus routes in a corridor. The Yan’an Road transit corridor in Shanghai is used as a case study. The results show that the proposed method can increase the system resilience by balancing operation cost and passenger-based cost. It also provides a guideline for realistic bus schedule coordination.
Highlights
Providing convenient transit services for passengers at reasonable total cost is one of the main purposes of transit agencies
Resilience reflects how a transit system is influenced by changes in its environment and how it recovers from such change. is paper proposes a method for schedule coordination considering transit system resilience. is method increases system resilience while balancing operator and user costs. is optimization is based on real-world environments, involving passenger flow fluctuations and travel times based on traffic conditions
Conclusions and Recommendations is paper proposed an extension of the schedule coordination method by Ting and Schonfeld [13] for jointly optimizing headways and slack times in coordinated schedules for public transportation routes within the aspect of resilience. is method is applied in a realistic case, with passenger flow fluctuations as well as travel time variability based on operating conditions. e main contributions are as follows
Summary
Providing convenient transit services for passengers at reasonable total cost is one of the main purposes of transit agencies. E potential value of schedule coordination is that user waiting time may be reduced at transfer stations if vehicles from different routes can arrive at transfer stations simultaneously (or nearly so). Metropolitan areas have complex traffic conditions as well as stochastic transit demand, which may force some vehicles off their schedules and greatly increase the difficulty of achieving coordinated timed transfers. Slack time, which is a buffer parameter, should be included and optimized in schedules in order to reduce the probability of missed connections for passengers at transfer stations. It is important to optimize the headway, which influences the vehicle operating cost and passenger waiting time. Erefore, a method is proposed here for jointly optimizing bus headways and slack times in an integrated bus system with multiple transfer stations in a transit corridor. Resilience reflects how a transit system is influenced by changes in its environment and how it recovers from such change. is paper proposes a method for schedule coordination considering transit system resilience. is method increases system resilience while balancing operator and user costs. is optimization is based on real-world environments, involving passenger flow fluctuations and travel times based on traffic conditions
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