Signal optimization and coordination for bus progression based on MAXBAND

A new bandwidth-based approach for bus lane systems is proposed to optimize and coordinate signals and achieve bus progression along urban streets. Elements of the bus systems, such as bus speed, locations of bus stops, and dwell time, were considered to be relevant variables in the proposed approach, which is based on the classic MAXBAND program. First, to establish the bus progression model, intersections along the main street are categorized based on the locations of the bus stops. Second, mixed integer linear programming is employed to construct models that adhere to the following two basic principles: (a) optimizing the bandwidth for each group of intersections and (b) connecting the central lines of green bands for adjacent groups. A software package is then utilized to obtain the global optimal solutions for the model, and a time-space diagram can be created based on the results. Finally, a case study is presented to illustrate the application of the proposed approach. The results show that the proposed approach generates significant improvements in not only the operational performance of the bus lane system but also the average performances of all passengers in the entire traffic system.

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