Abstract
To fully achieve effective rail transit, prevent the waste of conventional bus capacity along a rail transit line, and relieve the urban traffic congestion problem, it is necessary to screen for the adjustment of conventional bus lines prior to the operation of rail transit to provide a basis for further optimization of bus lines. Based on the analysis of spatial relationships between a rail transit line and conventional collinear bus lines and considering the time advantage characteristics of rail transit in rush hours, a model of the generalized travel time costs and travel time savings proportion in the collinear section of rail transit and bus was proposed. To evaluate the utility of rail transit relative to conventional bus collinear lines, the conventional bus lines to be adjusted were determined. Taking Xiamen as an example, the bus lines of Hubin East Road Station as the endpoint of metro line 1 were employed to calculate the model using GPS data of the buses, and the bus lines to be adjusted in the Hubin East Road were determined. The results show that the model is effective in the elastic selection of conventional bus lines that need to be adjusted and provides decision-making support for urban comprehensive public transport planning.
Highlights
In the process of continuous urbanization, the urban scale and population keep expanding, and the demand for long-distance and large-volume transportation keeps growing
Among the changes in travel time before and a er the travel mode transfer, the proportion of travel time savings within 10% can be considered as no travel time savings [20]. e proportion of travel time savings refers to the proportion of the time saved a er transferring to rail transit relative to the original bus travel time. erefore, in this paper, the proportion of time saved by choosing rail transit in the collinear section is defined as less than 10% of the total travel time of the conventional bus line, which indicates that the rail transit has no time advantage in the collinear section, that is, the time services provided by the two modes in the transport corridor are equal
Lines 657 and 658 satisfy the conditions, they are not conventional bus lines to be adjusted in the research model of this paper. e main reason is that line 657 has a small proportion of collinear section with rail transit, and passengers undertaking longโdistance travel by bus will not obtain large travel utility if they transfer to rail transit in the collinear section
Summary
In the process of continuous urbanization, the urban scale and population keep expanding, and the demand for long-distance and large-volume transportation keeps growing. Since the problem of traffic congestion in rush hours need to be improved first a er the rail transit is introduced, this paper first considers the time advantage brought by the rail transit in rush hours and the time utility of the rail transit and conventional bus in collinear channel. Based on this evaluation, the conventional bus lines to be adjusted are determined, which provides a basis for further formulating adjustment measures
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